These high quality pins are ISO 9000 and QS 9000 certified and Statistical Process Control (SPC) is fully implemented throughout manufacturing. 100 Rockwell Tested Case Hardened (Computerized Gas Process) Gun Punched ID with 3 Stages of ID Weight Tolerances +/- 1g Precision Ground Ends with ID Radius Straight Wall Design to Reduce Pin Wear on Ends Available with chamfered ends for wire locks Cryogenically treated (sub-zero heat treatment process) to improve material strength and grain structure Stock coated pins Length 2250mm Material 9310 Steel Type Chromoly (Wire) Wall Thickness 200mm Wrist pin diameter 830mm Images used may be generic. Actual product may vary.