Consert masonry fixing screws are self-tapping & plug less.
The self-tapping thread with a spaced thread form provides ultimate grip and allows for multiple re-fixing, without stripping the previous tapped hole. A T30 star drive bit gives optimum drive efficiency, improving grip and extending bit life.
No plug is required when fixing into concrete, solid brick, sand-lime brick, pumice stone, honeycomb brick, natural stone, etc. - Permanent and secure in many applications including window and door frame fixing, timber beams and battens.