4-point hose can use 22 wrench socket or 19 socket. The size of the wrench depends on two conditions, such as the nominal diameter of the nut and the strength of the bolt.
The socket wrench is composed of multiple sockets with hexagonal holes or dodecagonal holes, and is equipped with various accessories such as handles and connecting rods, which is especially suitable for tightening bolts or nuts with very narrow positions or deep depressions.