With the high quality tools contained in these kits, O.D.'s, I.D.'s, Depths, and Lengths can be accurately and reliably measured. Includes: 0-1" Micrometer (.0001" grad., Carbide tipped faces, Friction thimble, Locknut, Satin chrome sleeve) 6" Dial Caliper (Reading .001", Fully hardened stainless steel, Outside, inside and depth measurement, Satin chrome finish) 6" Rule (1/8, 1/16,1/32,1/64" graduations, Satin chrome finish, Stainless steel, Fully flexible ) Fitted plastic case.