This kit includes five carbide-tipped bits made by Whiteside Machine with a 1/4" shank:  1/8", 3/16", 1/4", 3/8", and 1/2".  Smooth and  impeccably clean cuts for decorative fluting,  juice, and  plate-shelf grooves and/or  detailing in hardwoods, composites, plastics, and solid-surface materials.