Sealey WallDrive Sockets 3/8"Sq Drive - Sealey S3818, 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. Sealey S3818 Walldrive Socket 18mm 3/8"sq Drive