Best Utility Knife? 16 Blades Tested for Grip and Lock Strength

A box cutter looks like the simplest tool in any drawer, right up until the blade lock fails mid-cut or the release button eats a fingertip every time you swap blades. The differences between a good utility knife and a bad one rarely show up on the shelf, since every model promises a smooth-locking blade and a comfortable grip. They show up when you actually put force on the thing.

A hands-on bench test put 16 utility knives through a full battery of grip, lock, and blade-change checks, and the spread between the best and worst performers was bigger than the price tags suggested.

What the testing showed

Every measurement below comes from Project Farm, who bought 16 utility knives, spanning retractable folding models and fixed-blade cutters, and ran each one through the same force, comfort, and durability checks. The full 16-knife breakdown is on the utility knife comparison, and every figure here traces to that video.

The lineup covered Fiskars, Milwaukee, Black and Decker, DeWalt (two entries, a standard and a folding model), Gerber, Husky, Crescent, Stanley Fatmax, Craftsman, Irwin, CAT, Kobalt, Sheffield, and Klein Tools (two entries). Each knife was tested for:

• Force required to open, both fully and from a midpoint position.
• Force to release and retract the blade, and force needed to unlock it.
• A subjective comfort rating, scored 1 to 5.
• Lock failure load, how much force the blade lock could take before failing.
• Belt clip ease and holding strength, plus a 70 lb impact test and a 25 lb blade retention check.

Fiskars Pro won on overall average finish

Fiskars Pro, at 14 dollars, was declared the overall winner, with the best average finish of all 16 knives across the comfort, blade-change, and belt-clip categories combined, at 2.8. The test notes that this result held even when those three subjective categories were excluded from the average, meaning Fiskars performed consistently across both the subjective feel tests and the harder force measurements.

Milwaukee finished a close runner-up

Milwaukee, at 13 dollars, finished second overall. The test's own line: "Milwaukee finished in second" on average, with the narrator separately adding "I also like the Milwaukee knife quite a bit." It required very little force to open at 28 g and posted 184 lb on the lock failure test, moving it into second place on that measure specifically. Its comfort rating landed at 2 out of 5, lower than several competitors despite its strong lock performance.

Gerber's EAB Light was the lightest but had lock weaknesses

Gerber's EAB Light was the lightest knife of all 16 tested at 60.3 g, and it earned the highest comfort rating in the test at 4.5 out of 5. Its liner lock, though, failed at just 51 lb, bending and jamming the knife in the open position under the lock failure test, a meaningfully lower number than the button-lock designs used by Fiskars and Milwaukee.

Stanley Fatmax was tough on the fingers during blade changes

Stanley Fatmax, at 12 dollars, required 4.2 lb of force to release the blade, the hardest on the fingertips of any brand up to that point in the test. It partially offset this with an easy button-unlock mechanism requiring less than 3 lb of force, and it can hold two spare blades at once, a feature not counted in the video's general spare-blade recap.

The most expensive knife in the test failed a basic safety check

Klein Tools' Auto model, at 22 dollars, was the single most expensive knife in the entire 16-knife test and the only one of the 16 to fail the blade-retention test outright, a check for whether the blade stays securely locked under load. It did perform well on the impact test, folding correctly afterward unlike several cheaper models, showing that a knife can pass one durability check and fail another entirely different one. A separate, cheaper Klein Tools model, the 44131 at 18 dollars, locks in both the closed and open position and finished fourth place overall with a solid average finish, actually outperforming its pricier stablemate.

How to read this for your own purchase

The gap between the top finishers and the rest of the field in this test was less about price than about lock mechanism design; button locks and liner locks behaved very differently under force.

For a knife you will actually rely on for repeated heavy cutting, Fiskars Pro's combination of top overall finish and consistent performance across both subjective and force-based tests makes it the strongest all-around tested pick, and it is one of the least expensive knives in the lineup at 14 dollars.

If you want the most comfortable grip for long sessions, Gerber's EAB Light had the best comfort score in the test, though its lock failure result was notably weaker than the top two finishers, worth weighing if you expect the knife to take real impact or side load.

If blade changes happen often, avoid designs that scored poorly on force to release the blade; Stanley Fatmax's 4.2 lb release force was the hardest on fingertips of the brands measured at that point in the test.

A few rules the data supports regardless of brand:

• Lock mechanism type predicts lock strength more than price does. Button-lock designs in this test generally outperformed liner-lock designs on the failure test.
• Comfort and durability can trade off. The lightest, most comfortable knife in the test also had one of the weaker lock failure results.
• Belt clip quality is a real, separately tested feature, not an afterthought; check it if you carry the knife on a work belt daily.

Browse the rest of the hand tools tested this same hands-on way for wrenches, pliers, and screwdrivers put through comparable head-to-head testing.