Bits Precisely match the requirement of the American dimension and standard. American industry classification C3 Carbide. Provide superior wear resistance and sharp edges for the best finish. MNA 24-piece set is an all-purpose set for the professional woodworker. It has a great variety of the most popular carbide-tipped bits in a protective storage case. Fit for all types of wood material, such as MDF, hardwood, softwood, and particle board. Universal 1/4Ԡshank is compatible with all major router instrument (either handheld or benchtop router table) such as MNA, Kowood, Bosch, DeWalt, Makita, Milwaukee, Porter & Cable, Skil, Ryobi, Black & Decker.