Multiple Specifications: 3 Pieces 8 mm Shank 45 Degree Lock Miter Router Bit, Including 1-3/8", 1-1/2", 2" Cutting Diameter to Handle Different Material Thicknesses. Made of Hard Alloy Steel with High Hardness; Heat-Treated Blades Are Sharp and Smooth. Coated Surface Provides Rust Resistance and Extended Service Life. Universal Joinery Tool: 45-Degree Lock Miter Router Bit Designed to Join Boards at 90 Degrees. Easy to Use by Routing One Board Vertically and the Adjacent Board Horizontally. Suitable for Use on MDF, Solid Wood, Particle Board, Plywood, Door Frames, Windows, Cabinets, Boxes, and Other Woodworking Applications. Compatible with CNC Routers, Automatic Routers, Handheld Routers, and Table-Mounted Portable Routers.