Features: The drill bit accurately meets the requirements of American dimensionsand standards. MNAhard alloy according to industry classification in the UnitedStates. Provide excellent wear resistance and sharpedges for optimalpolishing. TheMNA 15 piece set is a common milling cutter set for DIY woodworking. It has various of the most popular hard alloy milling cutters, packaged in wood boxes. Suitable for all types of wood materials, such as medium density fiberboard, hardwood, wood board, and particle board. Universal 1/4inch (approximately 0.6cm) axiscompatible withall mainstream router instruments (handheld or desktop router stations) Specifications: Bits Material: Hard Alloy Box Material: Wood Shank Size:approx 6.35MM/ 8MM Quantity： 15PCS Package Includes: 15PCS Milling Cutters note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.