Self-tapping screws are different to traditional screws as they tap their own threads when screwed into either plastic, wood or metal.
The Torx compatible drive is a reliable method of fixing screws. This drive can take more torque and does not slip.
The hexalobular socket screw drive, known as Torx or star drive, uses a star-shaped recess in the fastener with six rounded points.
TORX Drive Self-Tapping Screws