- High-quality screws for fixings in concrete, brick, and natural stone - Size 7.5x102mm, box of 100 units, ideal for DIY and professional projects - Direct installation without the need for plugs, only requires a 6 mm pilot hole - Serrated countersunk head for a flush and secure finish - Includes Torx T30 bit to facilitate screwing and achieve greater torque - Serrated thread that cuts its own thread in masonry, allowing for reuse - Allows fixings near edges without risk of breakage, unlike traditional plugs - Suitable for fixing windows, doors, battens, baseboards, and repair work in masonry - Made of steel with yellow zinc coating, resistant to corrosion and wear - Reliable, effective, and simple solution for all types of fixings in masonry substrates