Cold Chisel, 5/16 In. x 5-1/8 In./ OVERALL LENGTH: 5.125 INCHES NOMINAL SHANK SHAPE: HEXAGONAL CUTTING EDGE WIDTH: 0.312 INCHES NOMINAL SHANK WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL MATERIAL: STEEL SPECIFICATION/STANDARD DATA: 05047-ASME B107.410 CAT 48 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 2 CLASS