The Timco Multi Fix Concrete Screws 7.5X100 are high-quality fasteners made of steel, specifically designed for securing concrete stones. With a screw size of 7.5mm and a box of 100, these screws are ideal for DIY projects and home improvement. Manufactured in the United Kingdom by Timco, known for their reliability and durability, these screws are a versatile and essential addition to any toolbox. Perfect for a variety of applications, these concrete screws provide a strong and secure hold for your construction needs.