Features: Engineered with double spirals flutes and carbon steel tips, this lockhole saw cutter delivers 50% faster drilling speed and extended durability for precise hinge boring in wood, plastic, and metal materials. Features a 1/2inch shank for instantly tool compatibility and a centering design that maintains 0.5mm accuracy, paired with chips breaking grooves for effortless debris removal during deeply mortise cuts. Essential for professional carpenters, door installers, and DIYer enthusiasts tackling high precisions tasks like furniture joinery, cabinet hardware fitting, and industrial wood assembly projects. Good at in creating hinge recesses for doors, crafting mortise and joints in tables/chairs, and drilling lock preparation holes across hardwood and engineered wood surfaces. Built with wear resistant and reinforced carbon steel edges, this multi materials cutter withstands prolonged use in workshops and construction site while maintaining sharpness cutting performances. Specifications: Component: Carbon Steel Type: 1/2, 5/8, 3/4 Package Includes: 1Piece Drill Bit note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.