Chrome Vanadium steel Total DriveĀ® sockets, hardened and heat treated for strength with a fully polished mirror finish for resistance to corrosion. Can be used on a wide range of fasteners. All are suitable for Spline, Metric Hex and Bi-Hex, with many also equivalent to TRX-Star*, Whitworth, Imperial Hex and Imperial Bi-Hex. Knurled ring for extra grip with greasy fingers. Supplied on rail. Features & Benefits: ā¢ Chrome Vanadium steel Total DriveĀ® sockets, hardened and heat treated for strength with a fully polished mirror finish for resistance to corrosion. ā¢ Can be used on a wide range of fasteners. ā¢ All are suitable for Spline, Metric Hex and Bi-Hex, with many also equivalent to TRX-Star*, Whitworth, Imperial Hex and Imperial Bi-Hex. ā¢ Sizes: 13, 14, 15, 16, 17, 18, 19, 21, 22, 24mm. ā¢ Knurled ring for extra grip with greasy fingers. ā¢ Supplied on rail. ā¢ Lifetime guarantee*. ā¢ Model No. AK70610D Specifications: Model No AK70610D Brand: Premier Configuration: Total DriveĀ® Contents: 13, 14, 15, 16, 17, 18, 19, 21, 22, 24mm Depth: Deep Nett Weight: 1.44kg Qty: 10 Type: 1/2″Sq