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 Made of stainless steel,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, Weight: 0.4960400895 Pounds, Manufacturer: CYDZSRA