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. Delivered in a box with 3/8" and 0.157" dia. stem, stylus 0.039"/0.079"/0.118" dia., swivel clamp and holding bar. 19.9mm Length, Anti-Magnet, Jeweled Bearing.