What should be paid attention to when using open-end wren?

If the open-end wrench and box wrench are used improperly, they will wear the wrench and bolts or nuts, reduce the service life of the wrench, and cause personal injury in severe cases.
Precautions for the use of open-ended wrenches:
Open wrench: One or both ends are made with a fixed size opening for screwing nuts or bolts of a certain size.
(1) Open-ended wrenches can only pull bolts or nuts in a limited space. After the bolts or nuts are pulled to the limit, remove the wrench and repeat the original process.
(2) The direction of pulling the wrench should be toward the direction of the attached jaw.
(3) When using an open-end wrench for the final tightening, the force applied to the wrench should not be too large, otherwise the thread will slip.
(4) The wrench should be completely clamped on the bolt to increase the contact area.
(5) Only use wrenches with the same size as the bolt or nut opposite side distance.
(6) If the size of the wrench is selected too large, the bolt or nut will be damaged.
(7) Wrong use of the wrench will damage the wrench or bolts and nuts.