Feature: 1. Can be used for highstrength fasteners, mechanical fasteners, furniture fasteners, vehicle fasteners, and automotive shaped parts. 2. Cap nut can prevent loosening of the nut. 3. Use the wrench to fix the main screw when disassembling, it is not easy to slip, and it is mostly used for rough and simple components. 4. Made of high quality PE, high strength, not easy to break. 5. Well packed in a transparent box for convenient storage and carry. Specification: Item Type: Hex Nut Cap Material: PE Optional Color: Black, White Quantity: 145pcs Model & Quantity: M4 x 50pcs M5 x 30pcs M6 x 20pcs M8 x 10pcs M10 x 20pcs M12 x 15pcs. Package List: 145 x Hex Nut CapCan be used for highstrength fasteners, mechanical fasteners, furniture fasteners, vehicle fasteners, and automotive shaped parts. Cap nut can prevent loosening of the nut. Use the wrench to fix the main screw when disassembling, it is not easy to slip, and it is mostly used for rough and simple components. Made of high quality PE, high strength, not easy to break. Well packed in a transparent box for convenient storage and carry.