Long Impaktor socket wrench insert for use with electric or pneumatic wrenches with 12.5 mm = 1/2" drive. Also usable at low-lying couplings and protruding thread rods. The Impaktor technology ensures a higher-than-average service life even at extreme requirements. With "Take it easy" tool finder with colour coding by size - for quick and easy identification of the required tool . With hexagon profile and socket with hole. The hexagon profile offers the transmission of high forces and loads the edges of the bolt or the screw head less than a double hexagon profile. For external hexagon bolts and screws.