Micrometer Depth Gage with Non-Rotating Blade, Ratchet Thimble, 0-3" Range, .001"
.045" thick x 1/8" wide (1.2 x 3.2mm) blade
4" (100mm) base
Combination ratchet and speeder for uniform pressure and quicker adjustment
Non-rotating blade: blade does not turn, but moves perpendicularly only
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