General description Package includes 6 pieces of 8 mm round cutters with sizes: 19.05 mm, 22.2 mm, 25.4 mm, 28.6 mm, 31.7 mm, and 38.1 mm. These bits are perfect for template cutting and various DIY projects. Technical specifications Shank diameter: 8 mm Sizes: 19.05 mm, 22.2 mm, 25.4 mm, 28.6 mm, 31.7 mm, 38.1 mm Material: Ground tungsten steel for cutters; 45 gauge steel for shank Usage Designed for cutting wood, particleboard, MDF, and various wood composite materials Avoid cutting metal materials such as steel and iron Suitable for all types of cutting and engraving machines Other information Cutters feature advanced spraying technology for corrosion resistance and a longer service life High strength and deformation resistance due to the 45 gauge steel shank Sharp and durable design