Our 41mm self-drilling jack-point screws let you quickly and securely fix plasterboard linings to higher gauge metal frameworks. Plasterboard linings must be fixed securely to achieve the best fire and acoustic performance. 41mm British Gypsum Jack-Point Screws have self-drilling points so you can fix to higher gauge metal frames. Use these corrosion resistant screws to fix composite plasterboard linings up to 30mm thick.