Magnetic Base Indicator Holder, Dasqua 

Magnetic base indicator holder with a strong 110 lb. pull. The indicator arm is 220mm (8.66"). Unit has three clamping holes (6mm, 8mm and 3/8") for use with metric and inch dial indicators. There is a dovetail groove for test indicators. The tightening knob is designed for comfortable grip. Constructed from high grade hardened steel and made on CNC machines for an accurate fit.