Made of high quality 304 Stainless Steel and nylon insert, fine workmanship, greatly enhancing the function of release and shockproof. Function: The Lock Nuts a secure hold (reducing slippage) and a lasting hold for any project. Standard hexagon type design, easy to install or remove. Applications: Mainly suitable for machinery, electric appliance, electronic/computer, automobile, sports equipment etc. hardware fastening accessories. Function: The Lock Nuts a secure hold (reducing slippage) and a lasting hold for any project. colour:Silver + blue Material:Stainless steel + nylon Package Contents: 60 * M3 Hex Lock Nut 20 * Hex Lock Nut 20 * M5 Hex Lock Nut 30 * M6 Hex Lock Nut 12 * M8 Hex Lock Nut 8 * M10 Hex Lock Nut Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.