*Essential machinist"s tool with easy to read 1-1/4" dial to check smoothness, find center*Automatic reversing contact point for always-clockwise hand rotation; dial reads 0-15-0*Gradations in 0.0005", range .030", carbide sphere contact point 11/16" x .078" diameter*Includes 5/32" and 3/8"-diameter dovetail mounts, foam-padded hard storage case*Durable satin chrome finish, non-yellowing crystal, fluted bezel for non-slip grip