StarFix 7.5mm self-tapping masonry screws for plug-free fixing to brick, concrete and stone. StarFix masonry screws out-perform other plug-less fixings in both performance and durability. The patented StarForm hi-lo thread create exceptionally strong fixings, quickly and easily. The high thread, cuts into the masonry, whilst the low thread compacts loose material to give better thread engagement. StarFix masonry screws will allow multiple re-fixing, without stripping and compromising the tapped hole.