Feature 1Can form high strength, wear-resistant and high-precision internal threads by installing these steel wire thread inserts into the screw hole of the workpiece. 2In the case of thread processing error or repairing damaged internal thread hole, using wire thread insert can make economic and effective repair of thread hole. 3After repair the threads, you can continue using the same specification of screws 4Conveniently and fast convert between metric and inch thread hole with wire thread insert. 5Applicable for high voltage switchgear, microwave communication, auto parts, air separation equipment, radiator, thread hole repair, thread conversion, etc. Item Type: Wire Thread Insert Material: Stainless SteelQuantity: 140pcsInstructions: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.. Package List 10PCS M3x0.5x2D Wire Thread Insert10PCS M4x0.7x2D Wire Thread Insert10PCS M5x0.8x2D Wire Thread Insert10PCS M6x1x2D Wire Thread Insert 10PCS M8x1.25x2D Wire Thread Insert5PCS M10x1.5x2D Wire Thread Insert 5PCS M12x1.75x2D Wire Thread Insert10PCS 2-56UNCx1.5D Wire Thread Insert 10PCS 4-40UNCx1.5D Wire Thread Insert 10PCS 6-32UNCx1.5D Wire Thread Insert 10PCS 8-32UNCx1.5D Wire Thread Insert 10PCS 10-24UNCx1.5D Wire Thread Insert10PCS 1/4-20UNCx1.5D Wire Thread Insert10PCS 5/16-18UNCx1.5D Wire Thread Insert10PCS 3/8-16UNCx1.5D Wire Thread Insert