High-quality alloy steel bodies with Anti-Kickback design and CNC balanced with high quality guide bearings. Premium C3 micro-grain carbide with heat resistant teflon coating to prevent building-up of sawdust, resin, and pitch. 1/2 Inch Shank Rabbet Router Bits with 6 bearings to cut rabbets of different depths: 1/8'', 1/4'', 5/16'', 3/8'', 7/16'' and 1/2'' Interchangeable bearings to cut 1/2'' rabbets of different depths on wide range of wood materials such as softwood, particleboard, MDF, laminate, plywood, etc. The slotting router bits can be used on a router table or desktop woodworking engraving machine like CNC hand-held and table-mounted router. Specification: color: as show Material: Carbide Tipped Shank Diameter: 1/2'' Rabbet Cutting Height: 1/2'' Rabbet Cutting Depths: 1/2", 7/16", 3/8", 5/16", 1/4", 1/8" 6 Bearing Sizes: 3/8", 1/2", 5/8", 3/4", 7/8", 1-1/8" with inner diameters of 3/16". Package Included: 1 Set Router Bit