Special device that allows the measurement to be fixed while measuring the disc thickness in different locations, suitable for accurate measurement of brake disc thickness. can be used for a long time and not easy to rust. Floating jaw assembly enables easy removal of calliper from disc while retaining reading. You can use these smooth moving vernier slider for fast measurement. handy, easy to use. Lightweight and durable, you can carry it to everywhere. colour:black Material:alloy size:Measuring Range: 0-60mm Package Contents: 1 x Brake disc thickness measuring caliper Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.