bullnose router bit set with 5 different radius sizes: 1/8", 3/16", 1/4", 5/16", 3/8" ; Bead Sizes: 1/4", 3/8", 1/2", 5/8", 3/4" Solid Hardened Steel Bodies with Build-up & Heat Resistant Teflon Coating for maximum strength, good wear resistance and impact resistance Industrial grade C3 Micro-grain Carbide Cutters, high performance for processing solid wood, particle board, MDF, plywood, compact panel, etc. Designed for adding a bullnose or half-round to the edges of shelves, table tops or any furniture top surface, great for flooring and wainscot paneling. 1/2 Inch shank half round bullnose router bit can be use on CNC and other automatic routers as well as hand-held and table-mounted portable routers.