Which Wire Stripper Brand Wins?
In our test we compared 14 wire stripper options head to head. Knipex (manual/regular) came out on top. See the measured results, the runner-up, the budget pick, and a link to the full test video.
Knipex (manual/regular)
Price shown in test: $50
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Irwin Vise-Grip (manual/regular)
Price shown in test: $14
Affiliate link. We may earn a commission at no extra cost to you.
Irwin Vise-Grip (manual/regular)
Price shown in test: $14
Affiliate link. We may earn a commission at no extra cost to you.
The quick take
The short version of why each pick lands where it does, built straight from the measured results.
“The brand with the best overall performance is the Knipex wire strippers with an average finish of 2.1.”
Best in 1 of 10 measurements, including Average Finish.
Best in 1 of 10 measurements, including Grip Strength Before Slip.
Best in 1 of 10 measurements, including Grip Strength Before Slip.
The measured results
Every number below is read straight from the test. Products are listed in the order they finished.
Weight
- 1Knipex manual/regular10 oz
/ 286 g (by far the heaviest of the 9 regular strippers)
- 2Irwin Vise-Grip, manual/regular6.2 oz
/ 177 g
- 3Klein Tools5.7 oz
/ 164 g
- 4Craftsman6.5 oz
/ 186 g
- 5Ideal4 oz
/ 116 g (lightest of the regular strippers at the time stated)
- 6Capri Tools5 oz
/ 143 g
- 7Kobalt5.4 oz
/ 153 g
- 8Mr. Pen6.6 oz
/ 189 g
- 9Dowell4.2 oz
/ 119 g (lightest at the time stated)
- 10Knipex self-adjusting5.5 oz
/ 157 g (very light for a self-adjusting model)
- 11Irwin self-adjusting11.4 oz
/ 324 g (heaviest of the self-adjusting group at the time stated)
- 12Dromild self-adjusting11.1 oz
/ 317 g
- 13Neiko self-adjusting11.3 oz
/ 321 g
- 14Horusdy self-adjusting11.2 oz
/ 320 g
Aluminum Cut Force
- 1Knipex manual/regular24 lb
(three-way tie for 1st with Ideal and the self-adjusting Knipex)
- 2Irwin Vise-Grip, manual/regular25 lb
(tied 2nd with Klein Tools)
- 3Klein Tools25 lb
(tied 2nd with Irwin)
- 4Craftsman26 lb3rd
(3rd place)
- 5Ideal24 lb
(three-way tie for 1st with Knipex regular and Knipex self-adjusting)
- 6Capri Tools34 lb
- 7Kobalt35 lb
- 8Mr. Pen41 lb
- 9Dowell52 lb
(worst of all 9)
- 10Knipex self-adjusting24 lb
(part of the three-way tie for 1st with Ideal and regular Knipex)
- 11Irwin self-adjusting66 lb
(about the same as Dromild)
- 12Dromild self-adjusting64 lb
- 13Neiko self-adjusting60 lb
(cutter located behind the pivot point, same design note as Horusdy)
- 14Horusdy self-adjusting59 lb
(design offers less leverage than most other brands; only has one cutting knife)
Length
- 1Knipex manual/regular8 in
- 2Irwin Vise-Grip, manual/regular8 in
- 3Klein Tools7 in
- 4Craftsman8 in
- 5Idealapproximately6 in
(shortest of the lineup)
- 6Capri Tools7 in
(same as Kobalt)
- 7Kobalt7 in
- 8Mr. Pen8 in
- 9Dowell7 in
- 10Knipex self-adjustingnot tested
- 11Irwin self-adjustingnot tested
- 12Dromild self-adjustingnot tested
- 13Neiko self-adjustingnot tested
- 14Horusdy self-adjustingnot tested
Sharpness
- 1Knipex manual/regular315 BESS units
(sharpest of all 9 regular strippers)
- 2Irwin Vise-Grip, manual/regular355 BESS units3rd
(3rd sharpest)
- 3Klein Tools420 BESS units4th
(4th sharpest)
- 4Craftsman340 BESS units2nd
(2nd sharpest)
- 5Ideal425 BESS units5th
(5th sharpest)
- 6Capri Tools710 BESS units
- 7Kobalt1,120 BESS units
(worst/dullest of all 9)
- 8Mr. Pen645 BESS units
- 9Dowell495 BESS units
- 10Knipex self-adjustingnot tested
- 11Irwin self-adjustingnot tested
- 12Dromild self-adjustingnot tested
- 13Neiko self-adjustingnot tested
- 14Horusdy self-adjustingnot tested
Fitment Rating
- 1Knipex manual/regular2
(decent fit)
- 2Irwin Vise-Grip, manual/regular2
(decent fit)
- 3Klein Tools1
(best fit, tied with Ideal)
- 4Craftsman2
(decent fit)
- 5Ideal1
(best fit, tied with Klein Tools)
- 6Capri Tools2
(decent fit)
- 7Kobalt2
(decent fit)
- 8Mr. Pen
not numerically rated; knives described as not properly aligned, wire fits very loosely
- 9Dowell
not numerically rated; knives properly aligned but a lot of slop around the wire
- 10Knipex self-adjustingnot tested
- 11Irwin self-adjustingnot tested
- 12Dromild self-adjustingnot tested
- 13Neiko self-adjustingnot tested
- 14Horusdy self-adjustingnot tested
Grip Strength Before Slip
- 1Knipex manual/regular159.6 lb4th
(4th best)
- 2Irwin Vise-Grip, manual/regular232.4 lb
(best of all 9, very impressive)
- 3Klein Tools119.8 lb
- 4Craftsman184.8 lb2nd
(2nd best)
- 5Ideal112.2 lb
(considered a good result given its short handles)
- 6Capri Tools165.8 lb3rd
(3rd best)
- 7Kobalt144.4 lb
- 8Mr. Pen154.8 lb
- 9Dowell82 lb
(worst of all 9, attributed to short length and dull teeth)
- 10Knipex self-adjustingnot tested
- 11Irwin self-adjustingnot tested
- 12Dromild self-adjustingnot tested
- 13Neiko self-adjustingnot tested
- 14Horusdy self-adjustingnot tested
Insulation Removal Force
- 1Knipex manual/regular4 lb
(clean on one side, not fully through on the other)
- 2Irwin Vise-Grip, manual/regular1.6 lb2nd
(2nd best, very clean cut)
- 3Klein Tools0.8 lb
(best of all 9, very clean cut)
- 4Craftsman3.8 lb4th
(4th best)
- 5Ideal2 lb3rd
(3rd best, very clean edges)
- 6Capri Tools5.2 lb
- 7Kobalt8.4 lb
(quite a bit of tearing)
- 8Mr. Pen6.4 lb
(deep cut but did not cut all the way through; ripped the plastic away)
- 9Dowell18.2 lb
(worst of all 9, tore the plastic)
- 10Knipex self-adjustingnot tested
- 11Irwin self-adjustingnot tested
- 12Dromild self-adjustingnot tested
- 13Neiko self-adjustingnot tested
- 14Horusdy self-adjustingnot tested
Stranded Wire Force
- 1Knipex manual/regular12.8 lb2nd
(2nd best, sharpest in the lineup but hole size slightly too large for this gauge)
- 2Irwin Vise-Grip, manual/regular14.8 lb4th
(4th best)
- 3Klein Tools12.6 lb
(best of all 9)
- 4Craftsman16 lb
- 5Ideal13.4 lb3rd
(3rd best)
- 6Capri Tools16.8 lb
(edged out Dowell)
- 7Kobalt18.2 lb
(worst of all 9, attributed to dullness)
- 8Mr. Pen17.6 lb
- 9Dowell17 lb
- 10Knipex self-adjustingnot tested
- 11Irwin self-adjustingnot tested
- 12Dromild self-adjustingnot tested
- 13Neiko self-adjustingnot tested
- 14Horusdy self-adjustingnot tested
All measurements (3 more)+
Screw Cutter Force
- 1Knipex manual/regular89 lb
(least force of the 7 brands with a screw cutter, cleanest cut, threaded easily)
- 2Irwin Vise-Grip, manual/regular92 lb2nd
(2nd best, threaded but took more effort than Capri)
- 3Klein Tools117 lb
(tied for weakest of the 7 brands with a screw cutter; cut was not perfectly clean)
- 4Craftsman95 lb3rd
(3rd best, took more effort to thread than Irwin)
- 6Capri Tools117 lb
(tied weakest of the 7 brands with a screw cutter, but made a clean cut and threaded easily)
- 7Kobalt110 lb4th
(4th best, but threads on the screw were damaged, would not thread into the nut)
- 8Mr. Pen117 lb
(tied weakest of the 7 brands with a screw cutter; shortened the bolt but did not make a clean cut, would not thread)
- 5Idealnot tested
- 9Dowellnot tested
- 10Knipex self-adjustingnot tested
- 11Irwin self-adjustingnot tested
- 12Dromild self-adjustingnot tested
- 13Neiko self-adjustingnot tested
- 14Horusdy self-adjustingnot tested
Average Finish
- 1Knipex manual/regular2.1
(best of all regular wire strippers, per the narrator's stated average)
- 2Irwin Vise-Grip, manual/regular2.32nd
(2nd best overall per the narrator's stated average, close behind Knipex)
- 3Klein Toolsnot tested
- 4Craftsmannot tested
- 5Idealnot tested
- 6Capri Toolsnot tested
- 7Kobaltnot tested
- 8Mr. Pennot tested
- 9Dowellnot tested
- 10Knipex self-adjustingnot tested
- 11Irwin self-adjustingnot tested
- 12Dromild self-adjustingnot tested
- 13Neiko self-adjustingnot tested
- 14Horusdy self-adjustingnot tested
Insulation Quality
- 10Knipex self-adjusting
uses two V-shaped blades capturing twice the insulation surface area of the other self-adjusting brands, positioned on the insulation throwaway side of the cut; produced a very clean cut without damaging the wire or insulation
- 1Knipex manual/regularnot tested
- 2Irwin Vise-Grip, manual/regularnot tested
- 3Klein Toolsnot tested
- 4Craftsmannot tested
- 5Idealnot tested
- 6Capri Toolsnot tested
- 7Kobaltnot tested
- 8Mr. Pennot tested
- 9Dowellnot tested
- 11Irwin self-adjustingnot tested
- 12Dromild self-adjustingnot tested
- 13Neiko self-adjustingnot tested
- 14Horusdy self-adjustingnot tested
How it was tested
- cutting force required through 12-gauge aluminum wire (lb)
- blade sharpness via Best Certified Sharpness Tester (BESS units, lower is sharper)
- subjective fitment rating of the stripping knives around 14-gauge copper wire (1-2 scale)
- screw/bolt cutter force and cut cleanliness on a number 8, 32-thread-pitch screw (lb, only 7 of 14 brands equipped)
- gripping strength before losing grip on 12-gauge aluminum wire (lb)
- force required to remove insulation from 14-gauge solid copper wire (lb)
- force required to strip 12-gauge stranded wire (lb)
- weight and length measurements
- qualitative design/damage assessment of the self-adjusting wire strippers on solid copper wire
“The brand with the best overall performance is the Knipex wire strippers with an average finish of 2.1.”
Data notes and caveats
Dual-category video: 9 regular/manual wire strippers ranked head-to-head with a stated average finish score (Knipex 2.1 winner, Irwin 2.3 runner-up and best value, Klein Tools and Craftsman also praised), plus a separate secondary category of 5 self-adjusting wire strippers assessed only qualitatively (sharpness tester and average-finish scoring were not applied to this group). Knipex self-adjusting is the clear standout of the secondary category due to a distinct V-shaped blade design; the other 4 self-adjusting brands (Horusdy, Neiko, Dromild, Irwin self-adjusting) share a flat two-paw clamp design that damaged wire strands and insulation in testing. Meta chapters align with test stages (Sharpness, Fitment, Grip Strength, Cutting Force, Stranded Wire, Self-adjusting pliers) rather than with individual products. 14 total products tested, matching the transcript's own count ('only 7 of 14 brands have a cutter designed for screws').
