The Timco Multi-Fix Concrete Screw is a high-quality fastener made of steel, measuring 7.5mm in size and 100mm in length. This pack of 100 yellow screws is designed specifically for securing concrete stones and other DIY materials. The Timco brand ensures durability and reliability, making it an ideal choice for home improvement and furniture projects. The multi-fix design allows for easy installation and secure attachment to various surfaces.