Material: Made of high quality galvanized carbon steel, durable and rust-resistant, hard and long lasting. Easy to install: just drill a hole of suitable size, then install these nuts with an Allen wrench. The tapered external thread makes it difficult to loosen. Uses: A variety of size options, suitable for soft woods such as pine, plywood, fiberboard, etc., have a good effect on the combination of furniture and woodworking. Not easy to slip: Made of high-quality zinc alloy, hard and durable, it is not easy to slip, easy to install and remove. Multiple specifications: 7 different sizes of rivet sockets, a total of 100 pieces, including 30 x M4 * 10, 30 x M5 * 10, 30 x M6 * 10, 15 x M6 * 15, 10 x M8 * 15, 10 x M8 * 20, 5 x M10 * 25, can meet your different needs. 1. These slotted nuts are made of galvanized carbon steel, which has durability and rust resistance, so it is not easy to slip when twisted. The unique self-tapping design of the external thread makes it easy to explode and has good tensile strength. It can effectively prevent falling off due to twisting or vibration. 2. Fix the hexagon socket screws in the storage box so that you can easily find the series and avoid loss when needed. Specifications: Material: Galvanized carbon steel Size: M4*10, M5*10, M6*10, M6*15, M8*15, M8*20, M10*25 Package includes: 30 x M4*10 30 x M5 * 10 10 x M6 * 10 10 x M6 * 15 10 x M8 * 15 5 x M8 * 20 5 x M10 * 25 Note: 1. Due to manual measurement, please allow an error of 1-2mm.