ALLOY STEEL MATERIAL; NICKEL CHROME PLATED FINISH; 7-1/2 INCH OVERALL LENGTH; OPEN SMALLER END TYPE; BOX LARGER END TYPE; 9/16 INCH SMALLER END SIZE; 9/16 INCH LARGER END SIZE; FORGED PROCESS; 12 POINT(S); 15 DEGREE X 15 DEGREE OFFSET ANGLE