Professional Grade Electronic Brake Rotor Gage Super large display in INCH/METRIC/FRACTIONS in a compact setup. Measures brake rotors. 2.5"/63mm length 3-1/2 throat depth. Features: Range: 0-2.5" 3.5" jaw depth for larger rotors Reads in INCH / METRIC / FRACTIONS Resolution: .0005" / .01mm / fractions 1/64" Direct inch/metric/fraction conversion Conical anvils for groove measurement Molded case