How to identify the quality of explosion-proof torx wrench?

1. After getting started, rotate the pulley of the tiger's mouth, from large to small, to see if there is a place where the teeth are stuck, and to see the degree of activity.

2. Whether the weight of the wrench is similar to that of a wrench of the same level. If it is relatively light, it is necessary to identify the raw materials. You can use a sharp tool to slightly scratch the expression and paint to see what raw materials are inside.

3. Carefully investigate whether the tiger's mouth is regular and whether there is any appearance of non-parallel or fracture.

After learning how to distinguish the quality from bad, you should also pay attention to the storage of the wrench. After the explosion-proof plum wrench is out of use, it should be wiped clean immediately. Those not in use within half a year should be oiled or preserved by anti-corrosion method, and those that have been out of use for more than one year should be oiled and stored in a substitute or box.