1. It is simple and light.
2. There are six contact surfaces between the socket head cap screw and the wrench, which are fully stressed and not easily damaged.
3. It can be used to tighten screws in deep holes.
4. The diameter and length of the Allen wrench determine its torsional force.
5. It can be used to tighten very small screws.
6. Easy to manufacture and low cost.
7. Both ends of the wrench can be used.
Specifications: 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, 14, 17, 19, 22, 27
