The CRL Round Edge Template Guide is a precise Corner Cutting Template with a variety of commonly used radii. Its solid plastic construction makes it economical and unbreakable so it will last for years. It gives you 12 radii (10 to 70 mm) to pick from, allowing you to score precise, repetitious cuts for tabletops, shelves, automotive glass, mirrors, and more. Manufactured in a tough, durable material, the RET12 features four slip-resistant pads that not only keep the Template in place during use, but also reduce the risk of scratching the glass.