General description The Concrete Frame Screws are self-tapping, zinc plated, and made from hardened steel, designed for durability and ease of use. This pack contains 100 screws, each measuring 7.5mm in diameter and 112mm in length. They are ideal for fixing window and door frames to masonry or concrete walls without the need for anchors or plugs. Technical specifications Material: Galvanized alloy steel Size: 7.5mm x 112mm Recommended screw diameter: 6.5mm Usage Designed for direct installation into pre-drilled pilot holes Suitable for fastening window and door frames to masonry or concrete walls Can also be used with roofing applications Other information The zinc plating provides temporary protection against rust Heavy-duty design ensures good holding power after installation