Double groove go-through spline socket

The go-through spline socket with a double groove design, that Jie Yang offers, is compatible with two kinds of ratchet. It is already patented in Germany and Taiwan, and also has patenting in the US. The special double groove design provides an alternative choice for users, if they don't need the extra ratchet. The size of the socket is the same as common specifications, so it suits regular hand tool users for all the purposes they desire, the supplier ensures. http://jieyang.imb2b.com/