Fangrui Product Details Router Bits Size: 4 Piece Rabbeting Router Bit With 1/4 Inch Shank. 6 Interchangeable Bearings: 1/16 Inch, 1/8 Inch, 3/16 Inch, 1/4 Inch, 5/16 Inch, 3/8 Inch. Different Cutting Heights: 1/8 Inch, 1/4 Inch, 3/8 Inch, 1/2 Inch. Depth Of Cut (changed By Changing Bearings) Compatible Machines: For Use On Cnc And Other Automatic Milling Machines As Well As Handheld And Benchtop Portable Milling Machines. Please Note: The Short Clamping Of This Router Bit May Cause Bending Sturdy Material: Made Of High-quality Carbide, Not Easy To Break. Ensures Sharpness And Durability For Effortless, Wood Cutting. High Hardness, Wear Resistance, Excellent Thermal Stability, Strength And Toughness Wide Applications: This Panel Router Bit Set Is Truly Versatile And Brings You Extra Convenience. Suitable For Use On A Variety Of Materials And Surfaces Such As Wood, Mdf, Particleboard, Plywood, Panels, Softwood, Hardwood, Etc. Note - Please Check The Shank Size Used With Your Router To Avoid Ordering By Mistake. Feed Speed And Sp