Performs easy and accurate measurement of narrow or recessed areas, plus inside and outside diameters that dial indicators cannot access. Resistant to water and dust thanks to the one-piece bezel and crystal design with O-ring. The glare-free flat crystal face has a scratch-resistant coating. 0-50-0 Scale, 8/4mm Stems, Stylus 2/1/3mm Contact Points, Clamp and Hold Bar, 44.5mm Length, Anti-Magnet, Jeweled Bearing, Long Contact Point.