High quality bits in precision ground carbon steel with tungsten carbide tips.Designed to quickly and cleanly cut, trim, chamber, and profile hard & soft wood, chipboard and similar materialsShank Diameter: 1/4"This cutter set contains a range of the most widely used cutters for decorative woodworkingUsage: The product is drilled using a professional electric drill, bench drill. Rpm 800-1000 or as close toas possible while also adding water for cooling the holes during operation is an advantageSupplied in handy wooden storage caseSuitable for wood, MDF board, hardwood and softwood