Key Points for Open End Wrench

1. Open end wrench pull the bolt or nut only in a limited space, the bolt or nut is pulled to the limit position, and then remove the wrench to repeat the original process.
2. Moved direction of the wrench should be pull to the inside, this operation more effort, if you must push out the wrench, open the palm of your hand to operate.
3. When tightening the bolts or nuts with an open-end wrench, the force on the wrench should be based on bolt tightening torque requirements, not too much, otherwise it will lead to thread slip.
4. When using an open-end wrench, if the position is too high, or only pinch a small part of the nut head, wrench in use will slip.
5. If the opening end of the open-end wrench is larger than the opposite platform width of the nut head, which also can cause the wrench to slip, make sure that the wrench and the nut are properly engaged.