Features 1、These thread inserts have self-tapping ability so that the base metal does not need to be tapped beforehand. 2、Self-tapping thread inserts have a maintenance effect on damaged threads. 3、Thread repair allows to continue using the same screws. 4、Self-tapping thread inserts have strong resistance to vibration and prevent loosening. 5、Simpler, more convenient and faster than ordinary steel wire thread inserts. Specification Item Type: Thread Repair Kit Thread Insert Material: Color Zinc Plated Carbon Steel Thread Insert Specification: M4x0.7 Application: Widely used in automotive, rail car, munition, ship, home appliance, construction machinery, communications equipment, electronics, engineering plastic, metal die casting and other fields Package List 10 x Thread Insert 1 x Twist Drill Bit 1 x Installation Tool