Simpson StrongTie 5.6mm x 175mm Strong-Drive SDWS Timber Screw, Double-Barrier Coating. T-40 6-lobe drive 600 pack

The StrongDrive SDWS is the 2nd generation structural screw, redesigned with a patented SawTooth Point. It delivers faster starts, less torque, and eliminates the need for pre-drilling, which means more screws installed and less labour for you compared to