HEX, ROUND TYPE; FORGED HIGH GRADE STEEL MATERIAL; 9-3/4 INCH X 1-3/4 INCH X 1-3/4 INCH OVERALL SIZE; 3/4 INCH DESIGNATED SIZE; BUSHING TOOL; DEMOLITION HAMMER USED ON POWER TOOL; SPLINE USED ON POWER TOOL TYPE; SHANK SIZE 21/32 INCH