Wera Tools - 9601 Magnetic socket rail, 3/8", empty1 socket rail, empty. For up to 10 sockets and or bit sockets with 3 8"" drive. The rail allows temporary attachment to metallic surfaces and, with its twist to unlock function, ensures secure locking and unlocking of the sockets. Features Rail with secure bit mounting and yet easy removal (twist to unlock) for temporary attachment on wall, shelf or workshop trolley Smooth Twist to Unlock mechanism for a secure fit and simple removal of the sockets