Professional, high performance construction screws.- Deep torx compatible insert ensures reduced cam out, higher torque levels and firmer drive.- Super sharp tip gives imediate bite from the first turn.- Patented self-drilling thread removes the need to pre-drill timber and reduces probability of splitting.- Hardened case and core give exceptional strength.- Protected by Elementech 2000 surface treatment.- Corrosion resistance up to 30 times longer than some standard zinc plated screws.- Impressive pull out value, less risk of working loose when used in subtrates that flex in use.- Flexes to 35º reducing likelihood of screw shearing.- CE approved for use in load-bearing timber construction.