High Carbon Steel Rip Claw Hammer, 20.0 Head Weight (Oz.), Smooth, 1 19/64 in Face Dia. (In.)/ OVERALL LENGTH: 13.250 INCHES NOMINAL HEAD WEIGHT: 20.000 OUNCES SPECIAL FEATURES: GRAPHITE HANDLE STYLE DESIGNATOR: 21 CARPENTER'S RIPPING, STRAIGHT-CLAW SPECIFICATION/STANDARD DATA: 05047-ASME B107.400 CAT 41 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD