Starrett 440 Depth Micrometers have a 63.5mm (2.1/2") base and 3.2mm (1/8") diameter measuring rods.
Reading surfaces have a satin chrome finish that resists rust. Ring-type lock nut for quick and sure locking. Combination ratchet and speeder for uniform pressure and quicker adjustment. Includes protective case.
Starrett Mechanical Depth Micrometer Graduation: .01mm Range: 0-75mm Base Length: 63.5mm
