Woodworkers use marking knives because a knife line is narrower and more precise than that made by a pencil. In addition, a knife scores the wood, which eliminates any chance of splintering when the joint is cut. A marking knife is sharpened with a single bevel, and in use, the flat side is placed against your straight edge. Since our marking knife has a spear point, it can be used either right or left handed. The blade is hand forged by Master Blacksmith Ikeuchi from a lamination of blue steel and soft steel. Each blade is individually hardened to Rockwell 64 and comes well sharpened. The length is 7¼˝, and the width is 5/8˝.