- Produced of hardened carbon steel with coating layer to avoid stain in outdoor applications 

- No pre-drilling reqiured 

- The partial thread on the shaft of the screw allows multiple elements to be clamped together securely without separation 

- TX drive quarantees secure transmission of screw-in torque and no pop-out of the bit 

- Notched thread and wax coating for reduced friction 

- Crack avoidance 

- Power and battery-saving