The Starrett 440, 440M, 445, 445M Series Depth Micrometer features a combination ratchet and speeder, ring-type locknut, ratchet stop and locknut. 0-3"¬ù Range, 2 1/2"¬ù Base, 3 Rods, Ratchet Stop, Lock Nut, Case.
- The depths of holes, slots, shoulders and projections can be measured with these fine tools
- 2-1/2" (63.5mm) base and 1/8" (3.2mm) diameter measuring rods
- Combination ratchet and speeder for uniform pressure and quicker adjustment
- Ring-type knurled lock nut for quick and sure locking