Luxury Material: This thread filler is made of high quality carbon steel zinc plated, the size of these thread repair kits is M3×0.5. Wide use: Thread repair kit is widely used in automobiles, railway carriages, military supplies, ships, household appliances, construction machinery, communication equipment, electronic products, engineering plastics, metal mold castings and so on. Easy to install: The thread repair kit is simpler to install, more convenient and faster. Self-tapping capability: The self-tapping screw casing features self-tapping capability, and the base material does not need to be pre-tapped. Self-adhesive screws have a maintenance effect on damaged threads. | Strong anti-vibration: Self-tapping screw casing is strong anti-vibration and prevents sagging. Thread repair can continue using the same screws.