Features 1、Widely used in automobiles, rail car, military supplies, ships, home appliances, construction machinery, communication equipment, electronic products, engineering plastics, metal die castings, etc. 2、The self-tapping screw sleeve has self-tapping ability, and the base material does not need to be tapped beforehand. 3、Self-tapping screws have a maintenance effect on damaged threads. 4、Thread repair can continue to use the same screws. 5、Self-tapping screw sleeve is strong against vibration and prevents loosening. 6、Installation is simpler, more convenient and faster. Specification Item Type: Thread Repair Kit Screw Material: Carbon steel plated zinc Screw Sleeve Specification: M3 x 0.5 Package List 1 x Twisted drill 1 x Installation tool 10 x Sheath