1、APPLICABLE SCENARIO: Use these tenon tongue and router drill tools to improve the performance of hardwood work and make beautiful handmade furniture yourself, ideal for kitchen and bathroom doors, office cabinets, floor to ceiling tables, bedroom shelving, exterior frames, wall, etc. 2、WIDE APPLICATION: This set of slotting and slotting milling cutter is suitable for wood, medium density fiberboard, particle board, dense plywood 3、USEFUL AND PRACTICAL: The round cutter set is an upgraded cutter kit designed to create flush decorative round edges 4、WIDE COMPATIBILITY: The universal 8 handle straight bit is compatible with all major milling machine instruments and is ideal for desktop mount milling machines 5、QUALITY MATERIALS: 2 flute straight router bits are made of tungsten steel alloy, with high hardness, wear resistance, strength and toughness, heat resistance and corrosion resistance