Cold-forged Chrome Vanadium steel socket. Hardened and tempered for added strength. Chrome plated in half chrome half satin finish with knurled ring for extra grip with oily fingers. WallDrive® socket configuration.18mm 3/8Sq Drive WallDrive® Socket• Cold-forged Chrome Vanadium steel socket.• Hardened and tempered for added strength.• Chrome plated in half chrome half satin finish with knurled ring for extra grip with oily fingers.• WallDrive® socket configuration.• Lifetime guarantee*.• Model No. S3818Model No: S3818:Brand: Premier:Depth: Standard:Drive: 3/8Sq:Material: Chrome Vanadium:Nett Weight: 0.06kg:Size: 18mm:PTDSEAS3818