Size:230 Product information:Product name:Hexagon socket head cap screwsMaterial:ironSurface treatment:galvanizedHead type:hex headYou will get:/b>80pcs 4*10mm60pcs 5 *10mm30pcs 6*10mm20pcs 6*15mm20pcs 6*17mm9pcs 6*20mm5pcs 8*20mm6pcs 8*25mmInstallation notes:/b>Need to drill a small hole of appropriate size with an electric drill,Use a hex key to screw it into the hole,Then add 2-3mm of wood glue to the hole (on the side wall).Insert the nut and turn it several times,Then drop 2-3mm of glue on the thread of the nut,Then turn the nut 180 degrees,Please fully tighten the nut,After that, the nut does not loosen and is firmly connected with the wood.Note: /b>The depth of the pre-drilled hole must be deep to the length of the inserted nut and the bolt may be turned beyond the depth of any the end part of the nut. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it