Cold-forged Chrome Vanadium steel socket. Hardened and tempered for added strength. Chrome plated with a fully polished mirror finish. WallDrive® socket configuration. Knurled ring for extra grip with oily fingers.4mm 1/4Sq Drive Fully Polished WallDrive® Socket• 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.• Lifetime guarantee*.• Model No. SP1404Model No: SP1404:Brand: Premier:Depth: Standard:Drive: 1/4Sq:Material: Chrome Vanadium:Nett Weight: 0.01kg:Size: 4mm:PTDSEASP1404