Fowler 52-225-005-1 Premium Depth Micrometers Clear microfine graduations on satin chrome finish Base constructed of hardened tool steel is precision ground and microlapped. All other surfaces are satin chrome finished. Quick and easy zero adjustment Rods hardened, ground and lapped on measuring surfaces and adjustable in either direction Interchangeable rods are fitted to the micrometer spindle against a positive stop and locked Ratchet thimble Threads hardened, ground and lapped for accuracy Price includes spanner wrench and fitted case