【High Quality Materials】Screw-in Nuts is made of high quality carbon steel, the surface treatment is blue and white zinc plated, high hardness, perfect wear resistance, oxidation resistance and excellent rust resistance, durable. 【130 Pieces Threaded Insert Kit】12 different types of threaded insert: 20 pieces: M6 x 10mm, 20 pieces: M6 x 13mm, 10 pieces: M6 x 15mm, 10 pieces: M6 x 17mm, 10 pieces: M6 x 20mm, 5 pieces: M6 x 25mm, 15 pieces: M8 x 15mm, 10 pieces: M8 x 17mm, 10 pieces: M8 x 20mm, 10 pieces: M8 x 25mm, 5 pieces: M10 x 20mm, 5 pieces: M10 x 25mm. 【Practical Design】The unique male thread provides a positive lock, not easy to loosen, preventing stripping by twisting or vibration. Comes in a quality transparent box with 12 compartments for easy sorting and use. 【Easy to Install】Drill a suitable hole and tighten with an Allen key, easy to use and no other complicated tools are needed. 【Widely Used】Suitable for modern furniture combinations, such as furniture, drawers, cabinets,