Manufacturer of Wood Chisel, Hand Tool , Torque Wrench, Socket Wrench, Pruning Shear...etc.
Nut only using on the removal of worn or damaged screws which the usual socket doesn’t have, but also can be used on the fixing & releasing the screws as usual sockets.
1/2”dr.x 17, 19, 21, 22mm x 82mmL.