Masonry & Concrete Screws from Fix Factory are the best you'll find on the web! - Permanent and secure in many applications including window and door frame fixings.
Adjustable Frame Screw 7.5 x 102mm - AFS102
Adjustable Frame Screw 7.5 x 182mm - AFS182
Adjustable Frame Screw 7.5 x 202mm - AFS202
Adjustable Frame Screw 7.5 x 62mm - AFS62
Adjustable Frame Screw CSK Head - 7.5 x 152mm - AFS150
Adjustable Frame Screw CSK Head - 7.5 x 82 - AFS80
Masonry Screw 4.8 x 57 Countersunk Head - MS4857
Masonry Screw 6.3 x 32 Hex Head - MS6332H
Masonry Screw 6.3 x 45 Hex Head - MS6345H
Masonry Screw 6.3 x 70mm Countersunk Head - MS6370
Masonry Screw 6.3 x 70mm Hex Head - MS6370H