Description: Used for repairing the damaged internal threaded holes, this screw thread insert is professional, and with the dedicated storage box, this set is portable and easy to store. By preventing loosening and slipping of threads to significantly improve the strength of threaded connections and wear resistance, this screw thread insert is practical. This screw thread insert set is made of carbon steel, it is hard and has high strength. The length of the storage box is 12.5cm, the width is 6.5cm and the height of it is 2.2cm, and the sizes of these wire thread inserts are M3-M12. It is mainly used for various low-strength metal and non-metal materials. Item Name: Screw Thread Inserts Material: Carbon Steel Features: Corrosion-resistant, Abrasion-resistant, High Hardness Size Details: Box Size: 12.5cm x 6.5cm x 2.2cm/4.92" x 2.56" x 0.87" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 58 x Screw Thread Inserts (10Pcs M3 x 0.5-M5 x 0.5 L6/M4 x 0.7-M6.5 x 0.75 L8/M5 x 0.8-M8 x 1.0 L10, 5Pcs M6 x 1.0-M10 x 1.5 L12/M8 x 1.25-M12 x 1.5 L15/M10 x 1.5-M14 x 1.5 L18/M12 x 1.75-M16 x 1.5 L22)