Digital Outside Micrometer Range 20 in to 21 in 508 to 533 mm Resolution 0.0001 in/0.001 mm IP Rating Not Rated SPC Output Yes Thimble Type Friction Anvil Material Carbide Includes Case Data Transmission LCD Digital Display Lock Nut Type Lever Maximum Measurement - Inch 21 in Maximum Measurement - mm 533 mm Minimum Measurement - Inch 20 in Minimum Measurement - mm 508 mm Spindle Material Carbide