[ Perfect packaging] 11 sizes: M48, M410, M510, M68, M610, M613, M615, M815, M820, M1015, M10*25. Different sizes can meet your different needs. [Insert Nuts Assortment Kit] Threaded wood inserts are used for pre-embedded connectors, wood furniture. Standard hexagon socket head, smooth and flat, features flange thread texture, stable structure and easy installation. [Design] Nut thread surface is smooth without burrs and the screw sleeve can be screwed on quickly. Precise external threading and beveled internal hex head ensure that the clamp nut is properly placed and firmly installed. [Easy to install] just drill the appropriate size hole and screw it. install with a hex wrench, the tapered outer threads make it hard to fall off due to vibration. [Scope of application] Suitable for soft wood such as pine, plywood, hardboard, wood fibers, etc. (a small hole should be drilled before installation). Product Description Wood Threaded Insert Zinc Alloy Screw M4 M5 M6 M8 Threaded