1. The clamp head can open and close flexibly and freely under the action of the spring.
2. When the blade is in a closed state, the gap between the blades should not exceed 0.3mm.
3. The hardness of the manual wire stripping pliers should not be lower than HRA56 or HRC30.
4. The manual wire stripping pliers can smoothly peel off the plastic or rubber insulation layer outside the wire core.
5. The handle of the manual wire stripping pliers has sufficient bending strength, and the deformation of the handle of the adjustable end face manual wire stripping pliers after bearing a load test of 20N · m is not more than 1mm.