Threaded inserts for wood. Metric thread, corrosion-resistant environmental protection. More use and installation: pre-drill the right hole, screw with the threaded insert screws. Connector Connector Hex Socket Drive Insert Threaded Nut Nut for Wooden Furniture Range. Applications: these furniture screws are suitable for hardwood/solid wood furniture, for furniture combinations. Features of insert type nut: these threaded inserts are inserted into the drilled hole by screwing, in this case, the outer protrusions will dig into the wood, preventing the nut from rotating or pulling out. Material: Zinc AlloyColor: Photo ColorPackage Contents:40*Hex Socket (*8)40*Hex Socket (*10)30*Hex Socket (*10)15*Hexagon Socket (M6*10)20*Hex Socket (M6*15)20*Hexagon Socket (M8*20)Only the above package content, other products are not included. Note: The light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.