Starrett® Outside Micrometer, Mechanical, Series: 232, 0 to 1/2 in, +/-0.00005 in Accuracy, Graduations: 0.0001 in, 0.0001 in Resolution, Flat Anvil, Flat Spindle, 0.2 in Spindle dia, Ratchet Thimble, Carbide Tip, Satin Chrome, 3-11/16 in L x 17/32 in W x 1-25/64 in H Starrett® T232XRL Mechanical Outside Micrometer, 0 to 1/2 in, Graduations: 0.0001 in, Carbide Tip, Satin Chrome