Features:* 84pcs 304 Stainless Steel Metric M3 M4 M5 M6 M8 M10 M12 Thread Stainless Steel Insert Shell Bolt * Locking design: locking the bolt in the threaded hole, avoiding sliding wire, improve the strength and stability of the bolt connection.* Low abrasion: high hardness, has little wear in connection with the bolt. Long service time, reusable.* Rust resistance: made of 304 stainless steel. An antioxidant layer is formed on the surface. Rust-proof and anti-corrosion.* Anti-loose: with a certain flexible and uniform load, eliminate the deviation of the screw hole and screw between the pitch and the toothed and absorb the vibration.* Easy to use: the damaged screw holes should be inserted into the wire sleeve without increasing the diameter of the screw hole. Specifications:Name: wire sleeveMaterial: 304 stainless steelSize: M3 M4 M5 M6 M8 M10 M12Quantity: 84 pcsMain function: screw repairPackage contents:20pcs M3 x 0.5 x 2D15pcs M4 x 0.7 x 2D15pcs M5 x 0.8 x 2D10pcs M6 x 1 x 2D8pcs M8 x 1.25 x 2D8pcs M10 x 1.5 x2D8pcs M12 x 1.75 x 2D