Description Description: These insert nuts are made from high quantity zinc alloy and comes in a resealable transparent plastic box. Screw-in insert nuts have an external thread and can be screwed in with a hex key wrench. This set of screw-in insert nuts come in different sizes and take different screw sizes. Widely used in the installation of mechanical fastener, furniture, etc. 273PCS insert nuts are enough for using. Specification: Material: Zinc Alloy Size Chart: 21x11x3cm/8.27x4.33x1.18inch Package Includes: 1 Box Threaded Insert Nuts(Included 50pcs M4x8 50pcs M4x10 40pcs M5x10 30pcs M6x8 30pcs M6x10 20pcs M6x13 20pcs M6x15 10pcs M8x15 8pcs M8x20 10pcs M10x15 5pcs M10x25) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!