Double Efficiency accuracy double edges design enhances wood slotting and edges trimming efficiency, solving traditional single jamming issues. Ideal for batch processing of mortise and tenons structures with smooth operations. Complete Size Set This 7 piece set covers 6 20mm cutting needs for various depth slots and edges trimming. Eliminates frequent tool changes, perfect for both craft projects and professional milling machines. sturdy Coating Technology blue coating extends tool life with enhanced resistance compared to steel cutter. Suitable for humid workshops or woodworking environments. generic 8mm Shank Standard 8mm shank diameter fits most electric routers, trimmers, engravers, and table chainsaws. Easy installation with strong compatibility across woodworking tools. Package includes: 7Pcs 8mm Blue Straight Woodworking Milling Cutter Set