Bimetal Hole Saw Drill Bit Cutting Tool for Hole Drilling in Gypsum Board, Plastic, Wood, Plywood, Thin Iron Plate, Thin Aluminum Plate, etc. [Material] The cutting edge uses high-quality bimetal, enhancing sharpness, corrosion resistance, and wear resistance, resulting in excellent durability. The center drill and shank are made of high-grade high-speed steel, providing good cutting performance and toughness. ● Examples of Installation and Use: Ventilation ducts, ventilation fans, downlights, ceiling boards, tables, plywood, mortar walls, handwashing facilities, switch sections, corrugated iron, piping work, electrical work, drums, and hole drilling in exterior walls. ● Specifications: Used for hole drilling in gypsum board, plastic, wood, plywood, thin iron plate, thin aluminum plate, etc. High-quality bimetal hole saw drill bit.