Interchangeable bearings to cut rabbets of different depths producing cuts on both surfaces Use on hand- and table-mounted portable routers Cuts all composition materials, plywoods, hardwoods, and softwoods Solid Hardened Steel Bodies with Anti- Design reducing design Precision ground for the smoothest cuts Easy to use Color: yellow,silver Material: Carbide Tipped Rabbet Cutting Depths: 1/2 inch, 7/16inch, 3/8 inch, 5/16inch, 1/4 inch, 1/8inch 6 Bearing Sizes: 3/8 inch, 1/2inch, 5/8 inch, 3/4inch, 7/8 inch, 1-1 / 8inch with inner diameters of 3/16 inch. : 1/4 Inch Package Contents: 1 * 1/4 inch handle tenon router drill bit 6 * bearings Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.