10 Impaktor socket wrench rails for use with 3/8" drive electric or pneumatic wrenches. The Impaktor technology ensures a longer than average service life even under extreme stress. The hexagonal profile used allows for high power transfer, while simultaneously being precise and protecting the profile. Take it easy with tool finder, color coding according to size - for quick and easy identification of the required tool. The rail enables temporary attachment to metal surfaces and a rotatable release function ensures the safe fastening and release of socket wrenches.