The OJ JCP CS75100 Concrete Frame Fixing Screws - Z+Y - 7.5x100mm are durable, easy-to-install screws designed specifically for securing frames to concrete surfaces. The Z+Y coating offers enhanced resistance against corrosion, providing longevity and reliable performance. At 7.5mm in diameter and 100mm in length, they provide a strong hold, ideal for both residential and commercial usage. These fixing screws also boast a convenient design that doesnt require pre-drilling, saving time and effort during installation.