Features:Cold-forged Chrome Vanadium steel socket.Hardened and tempered for added strength.Chrome plated with a fully polished finish.WallDrive socket configuration. Knurled ring for extra grip with oily fingers.Specifications:Model No: SP1213DSize: 13mmDrive: 1/2″SqDepth: DeepMaterial: Chrome VanadiumHeight: 137Width: 50Length: 23.