For fastening light elements in a layer of polystyrene or mineral fibre wool. Most often used for the installation of cameras, lamps and building numbering. 6mm Hex Socket - facilitates easy installation. We recommend using a 5.0 x 40 mm woodscrew - for proper installation.Size - 85mmLength mm - 85Collar Dia. mm - 27Socket Size mm - 6Thread Dia. mm - 25Colour - WhiteMaterial - Polypropylene (PP)Application - Lighting Installation, Security InstallationSubstrates - Polystyrene,Mineral Wool Boards.