Length: apporx 36cm/14.2inches, small, portable & easy to carry. crank cotter pin/ball bearing/ length measuring tool. With double-sided scale & mm & inch scale, inch for ball bearing measuring, mm for crank cotter & length. It's hardened steel for strength and satin-chrome finish prevents for glare and for your work. Designed to provide accurate bike parts measurements, but can be also used as a professional tool for metalworking, woodworking, or engineering.