Item Type: Wire Thread Insert Material: Stainless Steel Quantity: 140pcs Instructions: 1. Use a matching drill bit to drill holes. 2. Tap with a wire thread insert dedicated screw tap, the tapping depth must exceed the length of the wire thread insert. 3. Put the wire thread insert into the installation wrench with the tail downward, and turn the wrench handle to screw the wire thread insert into the threaded hole. 4. Use a punching tool to align the mounting handle (tail), strike the punching tool with a hammer, and the tail shank can be removed. 5. When there is a problem with the installation of the wire thread insert, the wire thread insert can be taken out by the wire thread insert removal tool.