8790 HMC Zyklop socket with 1/2", drive, 20 x 37 mmThe Wera manual and machine socket (ISO 2725 part 3) can be used in manual and machine operations. With ",Take it easy", tool finder with colour coding by size - for quick and easy identification of the required tool. Slip-proof for easy grip even with oily hands. With ball stop groove. For external hex