General description This 6-piece drill bit set is designed for woodworking and mortising applications. Made from special heat-treated steel, these bits offer high hardness and durability, making them ideal for achieving precise square holes when used with a mortise and tenon machine. Technical specifications Material: Special steel, heat treated Hardness: HRC48-50 Sizes included: 6.35 mm (1/4 in), 8 mm (5/16 in), 9.5 mm (3/8 in), 12.7 mm (1/2 in), 14 mm (9/16 in), 16 mm (5/8 in) Usage Suitable for construction, installation, renovation, and decoration Requires an electric drill, hammer, or other tools for operation Ideal for mortising, chiselling, and woodworking tasks