Carbon Steel Straight Edge for accurate marking out with a carpenters pencil or metal scriber. Case hardened to HRC 57 for durability. Surface ground for a smooth, comfortable finish. With a single 6mm diameter hanging hole for easy storage. Accuracy is 0.01% of the length of the straight edge. Made in England. Standard 12 months' warranty. Register your tool to extend this to 2 years. 1 x Maun Carbon Steel Straight Edge 76cm (30in)