4618RM-17件套筒扳手组 Socket Wrench Set- 1/2" Drive- 17 Pcs

The Drive  socket makes use of an innovative design that results in almost twice the contact of a standard flat-topped socket. This helps it transmit more torque at a fraction of the weight and cost. Additionally, this new design also helps protect against rounding of fasteners caused by repeated use of conventional sockets, helping you save on overall maintenance costs.