The Starrett S216 Digital Micrometer Set includes three digital micrometers in 0-1", 1-2", and 2-3" sizes. The set also includes ratchet stop, lock nut, and standards. This model features gracefully designed tapered frame for use in narrow slots and tight places. Combination ratchet and speeder for uniform pressure and quicker adjustment on all sizes. Set 0-3", .0001" Grad, Carbide Faces, Ratchet Stop, Lock Nut w/Stds in Case.