Does it have blade height adjustment? I could not get it to strip a 12 gauge wire.

There is a tension adjustment, which helps but I typically leave mine on the most firm setting. With larger wires like 10 or 12ga, I find I need to add a pressure to the top of the jaws for a firm enough grip. Typically I am already holding the wire with my off hand and it's now second nature. Where this tool really excellent is stripping 18-24ga multi-conductor cables. You can strip the outer coating and multiple inner strands at once with the same tool. The only thing I roll off the tension for is solid bell or thermostat wire. The stripping end will dig into the solid copper and the other end will bunch the coating up away from the wire end.

Will this work for speaker wire?

I haven't had any luck with it on Genesis Speaker wires in 16 and 14 gauge. Cat 5e and Cat6 STP and UTP it does well stripping the jacket but watch for nicks on UTP and peal back.

Will this truly strip all kinds of wires, like breadboard jumper wires?

Definitely: breadboard jumper wires are my primary use.

How well do these strip 12 gauge romex (individual conductors, of course)? That would be main use for these; already have simple strippers.

https://www.youtube.com/watch?v=r4XrsWv6enw&list=PLqVZGHwrUlvGV22O6vEEfTmhLLsNBVbRI&index=2#t=142.377521If you watch this Youtube video you see a man announce, at 50 seconds in, how he is replacing 12 gauge wire with 10 gauge. This fellow then easily strips 10 gauge wire at about 2:00 minutes withthis very vice grip tool. He makes it look so easy. It is not a commercial just a guy rewiring his portable solar panel.https://www.youtube.com/watch?v=r4XrsWv6enw&list=PLqVZGHwrUlvGV22O6vEEfTmhLLsNBVbRI&index=2#t=142.377521

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Description

🔌 Strip, Crimp, and Conquer Your Next Project with IRWIN Precision!

COMFORT MEETS DURABILITY - Ergonomic ProTouch grip reduces hand fatigue during long projects—work smarter, not harder.
ALL IN ONE CRIMPING POWER - Crimp insulated, non-insulated, and ignition terminals (7-9mm) with one versatile tool.
CUSTOM STRIP LENGTH CONTROL - Built-in adjustable stopper lets you set exact core strip length—no guesswork, just perfect results.
LIFETIME CONFIDENCE GUARANTEE - Backed by IRWIN’s lifetime warranty, this tool is built to last through every job.
EFFORTLESS PRECISION STRIPPING - Self-adjusting mechanism adapts seamlessly from 10 to 24 AWG for flawless wire prep every time.

The IRWINVISE-GRIP Wire Stripper features a self-adjusting jaw that strips wires from 10 to 24 AWG with a 2-inch jaw width for precision. It includes an adjustable stopper for consistent strip length and crimping capabilities for 10-22 AWG insulated and non-insulated terminals plus ignition terminals. Designed with ergonomic ProTouch grips for maximum comfort and backed by a lifetime warranty, this tool is engineered for professional-grade electrical work and DIY projects alike.

Specifications

Brand	IRWIN
Material	Strip wire from 10 to 24 AWG with our self-adjusting mechanism. Jaw Width: 2 inches
Color	Black
Product Dimensions	8"L x 0.25"W
Handle Material	Rubber or TPE
Item Weight	340 Grams
Grip Type	Ergonomic
Global Trade Identification Number	00038548088457, 00639302637890
Manufacturer	IRWIN
UPC	673765918691 132018548295 069060212679 642008699765 617407403695 014445375708 971477796102 014445411253 724943345225 787721838784 042526601255 639302637890 639302638064 956260483346 100069603959 803982926241 785533750485 642008198206 038548088457 172304309186 069060367850 801029655222 785533720747 984537616838 013222014755 163121499020 971500804392
Part Number	2078300
Item Weight	12 ounces
Item model number	2078300
Batteries	12V batteries required.
Is Discontinued By Manufacturer	No
Size	8" (200mm)
Style	Wire Stripper Only
Voltage	10
Item Package Quantity	1
Number Of Pieces	1
Usage	electrical work, DIY projects, professional settings
Included Components	wire stripper
Batteries Included?	No
Batteries Required?	No
Warranty Description	Manufacturer Warranty

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