These zamak fixings are suitable for fixing to plasterboard, as well as for paintings, pictures, wall lamps, air conditioner's evaporator coils, roller blinds, curtains, etc. They feature a high-load capacity thanks to the adjustment fixing. Due to their short length, they require less space behind the board, making them very suitable for pre-assembly. They are not necessary to pre-drill the drywall, which save time. You should only set the clutch or your drill to the forward position, adjusting the torque to avoid damaging both the plasterboard and the screw when the material to be fixed is subsequently placed. The self-drilling plasterboard fixings measure 13mm in diameter and 37mm in depth with a maximum thickness to be fixed of 8mm and a maximum cavity depth of 25mm.