A wrench used to much pressure – Khan The advantage of this type is a wrench catch Wen Li of bolts and knot. Therefore, it uses a very high tensile strength and pressure.
A wrench kind used to pressure - ridiculously huge advantage is that the wrench handle this type of polygonal bolt and nut fully. Thus, the tension and the pressure was very high.
A wrench type used with pressure - very competitive advantages is this kind of bolt wrench handle and square knots. Therefore, pull and push was very high.