【Specifications and models】1084Pcs M2 M3 M4 M5 (8mm/12mm/16mm/20mm) Hex Socket Head Cap Bolts Nuts Screws;Accord with standardized metric system and the average error is less than 0.01mm;
【Good- quality material】Made of high quality 12.9 Carbon Steel, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties,Suitable for long-term use;
【Wide Application】This screw is widely used and suitable for home, automotive, precision machinery,toys and electronic products,3D printers,electronic products and shop use,This kit has many sizes to meet all kinds of needs;
【Product packaging】Storage box packaging. Screws are sorted by size and stored in compartments of the box. There are explanatory drawings. Easy to identify and store.