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The Ninja pitch is simple: a knife set where the sharpener is part of the system, so the blades are meant to be honed on the block itself. That changes the buying question. You are not just choosing piece count and steel, you are choosing how the sharpener attaches, whether it can come off the block, and how much counter space the whole arrangement claims.
This guide is for cooks who want a Ninja knife set with sharpener and would rather skip the separate whetstone routine. It compares five distinct 2026 listings: the Premium 11-piece, the Space Saving 10-piece block, the NeverDull 10-piece, the 17-piece K32017, and the 12-piece Foodi NeverDull K32012. Color-only variants of the same models were left out, and every comparison uses wording from the titles alone.
Quick Picks
Ninja Premium 11pc Knife Set, Removable Sharpener, Nautical Navy WK62011PU1 | Customize your countertop: 45% smaller footprint without sharpener & steak knives. German steel. NeverDull™: sharp 10+ years.
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Ninja® Space Saving 10Pc Knife Block Set, Cyberspace, NK32010BL1 | Rust-resistant blades stay sharp 10+ years. Sharpen on/off block; remove NeverDull™ sharpener for a 35% smaller footprint.
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Ninja® Space Saving 10pc Knife Block Set, Light Grey, NK32010GY1 | Rust-resistant blades stay sharp 10+ years. Sharpen on/off block; remove NeverDull™ sharpener for a 35% smaller footprint.
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Ninja® NeverDull® 10-Pc Knife Set, Amazon Exclusive Bone & Champagne | Stays razor-sharp 10+ years. Premium German steel. Removable sharpener. Saving up to 35% more counter space, NK32010IV1
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Ninja® 17Pc Knife Block Set, Built-in Sharpener, Black, K32017 | Stays razor-sharp 10+ years. Rust-resistant German stainless steel. NeverDull™ Technology restores edges in a few swipes.
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View on Amazon| Product | Best for | Key spec from the title |
|---|---|---|
| Ninja Premium 11-Piece | Flexible countertop layouts | Removable sharpener, 45% smaller footprint without the sharpener |
| Ninja Space Saving 10-Piece | Small counters | Rust-resistant blades, sharpen on or off the block |
| Ninja NeverDull 10-Piece | Buyers who prize German steel | Premium German steel, removable sharpener |
| Ninja 17-Piece K32017 | Largest lineup | 17 pieces, built-in sharpener, rust-resistant German stainless steel |
| Ninja Foodi K32012 12-Piece | Mid-size block | 12 pieces, built-in sharpener, German stainless steel |
How to Choose
Built-in versus removable sharpener
The biggest split in this family is how the sharpener attaches. The K32017 and K32012 list a built-in sharpener, meaning it is part of the block. The Premium 11-piece and the NeverDull 10-piece list a removable one, and the Space Saving 10-piece describes sharpening on or off the block. A removable unit lets you shrink the footprint, because the Premium listing claims a 45% smaller footprint without it. A built-in unit is simpler and cannot be misplaced. If you live in a small kitchen and move appliances around often, the removable design is the more adaptable of the two; if several people share the kitchen and parts tend to wander, the built-in version avoids the problem entirely.
Piece count and what fills it
Ten pieces suit a household that cooks a few times a week, while twelve to seventeen suits families and hosts. Count means little until you see the contents. Check whether steak knives, shears, and the sharpener itself are included in the total, and look for a chef knife, a bread knife, a utility knife, and a paring knife as the working core. Sets that stop at ten pieces often drop the steak knives, which is fine if you eat with the knives already in your flatware drawer. Budget sets in this category tend to pad the count with small extras, so read the contents list line by line.
Steel and the sharp-for-years claim
Several titles say the blades stay razor-sharp for 10 or more years, and name rust-resistant German stainless steel or premium German steel. Treat the duration as a manufacturer claim, because it depends on use, cutting surface, and sharpening habits. What you can compare is the steel wording and whether the set pairs it with a sharpener you will actually use. A rust-resistant blade is helpful near a sink, but resistance is not the same as immunity, so drying knives after washing still matters. Ignore the length of any sharpness promise and focus on how convenient the sharpener is to reach, because a tool you skip does nothing.
Counter footprint and block shape
Measure the space where the block will sit, including the height clearance under cabinets. The Space Saving and Premium listings advertise compact layouts, while the 17-piece block is the biggest in the group. Where sets cut corners, it is often on block quality and slot fit, so look for a stable, flat-bottomed block in the full description. Also confirm that the block opening is deep enough for the longest knife and that the sharpener sits where you can reach it without moving other items.
The 5 Best Options
Ninja Premium 11-Piece
This is the flexible choice for people who like to control how much of the counter the set takes. The title lists 11 pieces, a removable sharpener, a navy finish, and a claim of a 45% smaller footprint without the sharpener attached. In practice that makes it a good fit for a cook who rearranges the counter for holidays or baking days and wants the knives to shrink out of the way.
- Strength: the removable sharpener lets you reduce the block’s footprint when you want more room.
- Strength: eleven pieces sit between the compact 10-piece sets and the large 17-piece block.
- Trade-off: a removable part is one more thing to store and keep track of.
Skip it if you want a sharpener that stays permanently built in, or if you prefer a block with the most pieces available. A buyer who never plans to detach the sharpener also gets less out of the main design idea. Cooks who like to keep a single, fully assembled unit near the stove, with no small parts to put back, may find the removable approach fussier than it is worth.
Ninja Space Saving 10-Piece
As the name implies, this block is designed to take up less space. The title lists 10 pieces, rust-resistant blades, and a sharpener that works on or off the block, with a model number of NK32010. It is aimed at renters and anyone who treats counter space as the scarcest resource in the room.
- Strength: the sharpen-on-or-off layout gives flexibility in tight kitchens.
- Strength: rust-resistant blades are named, which suits kitchens where knives sit near the sink.
- Trade-off: ten pieces means a thinner lineup than the 12- and 17-piece options.
Skip it if you host large dinners and need many steak knives, or if you want a long blade list. A household that prepares large family meals most evenings will probably outgrow ten pieces quickly, and the narrower block also leaves less room to add knives later.
Ninja NeverDull 10-Piece
The NeverDull 10-piece keeps the same piece count but focuses on steel. The title mentions premium German steel, a removable sharpener, and the line about staying razor-sharp for more than a decade. It reads as the steel-first option of the 10-piece pair, for buyers who scan titles for the metal before anything else.
- Strength: premium German steel is named plainly in the title.
- Strength: the removable sharpener supports a smaller footprint when needed.
- Trade-off: the sharp-for-years claim is the maker’s wording, not a measured result you can verify from a title.
Skip it if you want the biggest lineup or a built-in sharpener that never leaves the block. Buyers who distrust long-term sharpness promises should rely on the steel wording and keep up routine honing, since a claim of staying sharp for a decade says nothing about how you cut or what board you use.
Ninja 17-Piece K32017
This is the largest block in the comparison, aimed at families and anyone who entertains. The title lists 17 pieces, a built-in sharpener, rust-resistant German stainless steel, and the NeverDull technology label. For a busy household where several people cook, one fully stocked, always-assembled block is easier to share than a handful of separate tools.
- Strength: 17 pieces cover steak service, prep, and specialty tasks in one block.
- Strength: a built-in sharpener means no loose attachment to store.
- Trade-off: it takes the most counter space of all five options.
Skip it if your counter is small or you cook basic meals for one or two people. The extra pieces will go unused, and a smaller block will tidy the kitchen. Anyone who keeps knives in a drawer or on a magnetic strip will also find that a seventeen-slot block asks them to change their storage habits entirely.
Ninja Foodi K32012 12-Piece
The K32012 sits in the middle of the lineup. It is called the Foodi NeverDull Premium Knife System, lists 12 pieces, a built-in sharpener, German stainless steel, and a black finish. It makes sense for a family of three or four that wants a complete but not oversized block, with the sharpener handled in one place.
- Strength: 12 pieces cover most households without the bulk of 17.
- Strength: the built-in sharpener is permanent, so maintenance stays on the counter.
- Trade-off: the title names no removable option, so you cannot shrink the footprint.
Skip it if you want to detach the sharpener for a smaller layout, or if you need a very large steak-knife count. Because the title does not break down the contents, buyers who need specific blade types, such as a long slicer, should read the full item list before ordering.
Which One Fits Your Situation
You want the smallest footprint
The Ninja Space Saving 10-Piece is the pick, with the Premium 11-Piece as a second choice because its footprint shrinks when the sharpener is removed. Together they suit studio apartments, dorm-style kitchens, and shared houses where every inch of counter is precious.
You cook for a family and host dinners
Choose the Ninja 17-Piece K32017 for the largest lineup. The K32012 is a sensible step down if counter space matters. Either one lets a family keep a single block near the stove without hunting through drawers.
You care most about the steel
The NeverDull 10-Piece names premium German steel outright, and the K32017 and K32012 pair German stainless steel with a built-in sharpener.
You hate loose parts
Skip the removable models and go with the K32012 or K32017, where the sharpener is built into the block. The Foodi K32012 balances twelve pieces with a permanent sharpener, which suits a kitchen that is neither tiny nor built for a crowd, and nothing needs to be put back after each use.
Common Mistakes
- Treating the sharp-for-10-years claim as a guarantee when care and use set the real lifespan.
- Counting the sharpener or shears as knives when comparing piece totals.
- Overlooking the difference between built-in and removable sharpeners.
- Buying the 17-piece block for a kitchen with no room to hold it.
- Ignoring the lineup of knives and buying purely on the NeverDull branding, when the block layout and the contents list matter more day to day.
Specs and Terms Explained
Honing versus sharpening
A built-in sharpener usually has abrasive surfaces or ceramic rods that touch the blade each time it is drawn out. Light contact hones the edge, while heavier passes remove metal. Check how the maker describes the process: if it promises hands-free upkeep, assume it is mostly honing.
Removable sharpener
Where the sharpener sits on the outside of the block or can be lifted out, it is easier to clean and replace. A fixed internal sharpener is harder to reach if debris builds up.
Angle consistency
Guided slots hold the blade at a set angle, so a beginner gets a repeatable result without a stone. The trade-off is that the angle may not match the factory grind exactly, and over many years it can alter the geometry of the edge.
Piece count in this category
A number like 17 or 12 often counts the block, the sharpener and the shears. Focus on how many distinct blades you receive and whether a steak knife is among them.
Setup and Care Tips
- Seat the block on a level surface and slide each blade in with the edge facing the sharpening side, as shown in the instruction sheet.
- Give each knife only a few strokes at a time. More passes do not make a better edge and can remove steel faster than needed.
- Brush out the slots with a dry soft brush to clear metal dust that accumulates over time.
- Hand wash the blades, dry them thoroughly, and avoid soaking in the sink.
- Schedule a proper sharpening with a stone or a service every year or two, depending on how often you cook.
Who Should Skip These
Cooks who already own whetstones and enjoy sharpening by hand will gain little from a built-in system. It may even get in the way if you want precise control over the angle. Buyers who need a compact kit should be wary of the largest option, the Ninja 17-Piece K32017, since a bigger block claims more counter space.
If your top concern is a small footprint, the Ninja Space Saving 10-Piece fits that goal better than the larger blocks. Meanwhile, anyone who cooks only a few meals a week may find the Ninja Foodi K32012 12-Piece more than they need. A modest set with a good chef knife often beats a large kit filled with pieces that stay in their slots.
Sizing and Compatibility Checklist
- Measure the counter depth and the clearance under wall cabinets, then compare both with the dimensions listed for each block.
- Check which blades are included. A longer chef knife needs a slot that fits it fully, and a short block can leave the tip exposed.
- Confirm whether the sharpener detaches. If it does, make sure you have a spot to rinse and dry it.
- Note whether the set includes steak knives and shears, and whether you would rather keep those in a drawer.
- Look at how the block stays put. A base that slides on the counter makes it harder to pull a blade out cleanly, which matters when the sharpener is part of the block.
- If a knife needs more than light honing, plan on a whetstone, a guided sharpening kit or a local service as a backup.
Related guides
Frequently Asked Questions
Does a built-in sharpener replace a whetstone?
It simplifies routine honing and keeps edges usable between sharpenings. A whetstone or a professional service still handles heavy repairs better, so think of the block sharpener as maintenance.
What does a removable sharpener change?
It lets you shrink the block’s footprint, as the Premium listing claims a 45% smaller footprint without it. The trade-off is one extra component to store.
Are these knives dishwasher safe?
None of the five titles states dishwasher safety, so follow the care guide. Hand washing is generally gentler on edges and handles, and it keeps the sharpener slots free of detergent residue.
Which Ninja set suits a small apartment?
The Space Saving 10-Piece and the Premium 11-Piece are the compact choices, because both advertise smaller layouts. Measure the spot first, since even a compact block needs clear space above it to pull a long knife straight out.
