Micrometer Depth Gage, Ratchet Thimble, 0-150mm Range, 0.01mm
63.5mm (2-1/2") base and 3.2mm (1/8") diameter measuring rods
Combination ratchet and speeder for uniform pressure and quicker adjustment
Ring-type knurled lock nut for quick and sure locking
The depths of holes, slots, shoulders and projections can be measured with these fine tools