Wera 8790 hmc hf zyklop sockets with holding function can via a unique design hold the fasteners within the socket assembly or disassembly becomes easy where fasteners are recessed or in awkward spaces or where overhead work is necessary shallow headed fasteners can also be retained made from chrome molybdenum and incorporating off point drive these sockets are designed for intensive use sockets are also guaranteed for production use with non impact power tools take it easy the socket