1. Made of high quality carbon steel, it is anticorrosive and beautiful as . In addition, it can be used to measure the quality of thread with stop-gauge;2. And the compact thread is not easy to be out of shape and slid in the process of screwing. The deep and clear hex sockets and heads can make your working more easily.3. Widely using in home and office furniture, 3D printer parts, machinery, communication equipment, tool box and many other areas.Colour:blackMaterial:carbon steelPackage Contents:100 x M2 Nuts100 x Nuts25 x M2x6 socket head screw25 x M2x8 socket head screw25 x M2x10 socket head screw25 x M2x12 socket head screw25 x M3x8 socket head screw25 x M3x10 socket head screw25 x M3x12 socket head screw25 x M3x16 socket head screwPacking plastic box style: color random, 't accept the specifiedOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.