Socket Drive Size 1/2 In. Number of Points 12 Socket Depth Deep Metric Size 27mm Standard Tool(Accessory Needed for Tethering) Overall Length 3-1/4 In. Finish Full Polished Material Forged Alloy Steel Drive Type Square Output Type Hex Features TorquePlus Radius-Corner Design Standards ASME B107.5M AS954E S3.8.1