For removing insulation without nicks, cuts or scrapes. Cutting apertures accurate to 0 to +.0127mm. Each tool is made to strip one wire size only. Handles are color-coded by size of cutter. Cutting blades are finest razor blade steel. No adjustment of any kind ever needed. 5-3/8" OAL. (USA). Cutting diameter: .025, 26 AWG, grey.