Protect frameless steel encasements by fixing Glasroc F FireCase linings securely. These 50mm corrosion resistant screws help you securely fix Glasroc F FireCase linings to board or metal in frameless encasements. They're self-tapping to speed up installation, and their unique head design means they countersink into the board for easy finishing. Use them for fixing single 20mm Glasroc F FireCase linings to board, or for fixing linings up to 35mm to metal.