This self-tapping thread insert has a cutting slot on the head of the threaded sleeve, with high strength and wear resistant threads The cutting groove has the characteristics of self-tapping, ease of transfer, high impact resistance and anti-drop performance Self-tapping inserts do not need to be tapped in advance They can be screwed directly into the special holes reserved by the base material with an installation tool, which is economical and beautiful They can also increase wire strength for new products, which are used throughout the metal and plastics processing industry. Function: Color: golden Material: carbon steel Dimensions: Approx. 12.5 x 6.5 x 2.2 cm/4.92 x 2.56 x 0.87 inches Carbon steel material is durable and safe. Applicable to the automobile industry, railway vehicles, shipbuilding, household appliances, engineering machinery, commercial machinery, electronic products, engineering plastics, etc. Supports high tensile strength and strong vibration resistance they are easy to install Quality thread repair parts for you. The package includes: 10 x M3x0.5-M5x0.5-L6 threaded repair parts 10 x M4x0.7-M6.5x0.75-L8 threaded repair parts 10 x M5x0.8-M8x1.0-L10 threaded repair parts 5 x M6 x 1.0-M10 x 1.5-L12 threaded repair parts 5 x M8x1.25-M12 x 1.5-L15 threaded repair parts 5 x M10 x 1.5-M14 x 1.5-L18 threaded repair parts 5 x M12 x 1.75-M16 x 1.5-L22 threaded repair parts 1 storage handle