Features: Professional 6 piece keyhole router bit set offer high precise woodworking with anti corrosions coating for extended tool life. Features seamless high frequency welded 45# steel shanks, sharpened edges, and precise ground surfaces ensuring minimal runout during intricate joinery tasks. Ideal for cabinetmakers, furniture craftsmen, and serious DIYer enthusiasts requiring reliabled performances in detailed wood routing applications. Perfectly executes keyhole slots, picture frame hangers, lock mortises, and decorative grooving in hardwoods, plywood, and composite materials. The advanced sprayed painted surfaces treatments enhances wear resistance, making these router bits a long lasting solution for high frequency workshop operations. Specifications: Component: 45# steel Product usage: grooving, forming Weight information: 1/4x1/4 Single piece: 10g 1/4x5/16 Single chip: 10.1g 1/4x3/8 Single piece: 10.6g 1/4x1/2 Single piece: 11.7g 1/4x9/16 Single piece: 11.7g 1/4x5/8 Single piece: 13.7g Package Includes: 6pcs/set Woodworking Router Cutter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.