Widely Used: The hole saw is often used in wood, plastic, aluminum, non-ferrous metals, copper, plasterboard and other materials. Suitable for bench drill, electromagnetic drill, pistol drill, impact drill, etc. Convenient for you. Professional Quality: The bi-metal hole saw is made of premium M42 high speed steel, sturdy and abrasion resistant. The high speed steel teeth are heat treated, high hardness (65HRC), reusable and durable. Easy to Use: Thanks to its clean edge design, this hole saw cuts easily and effortlessly. The spring around the drill bit automatically pushes the saw washer immediately after completing the hole. Can be used with a standard adapter in all drills with SDS-plus or hexagonal chuck. New design Pre-drilled holes have a beneficial effect on chip evolution to improve the removal speed of cylindrical iron threads in the hole. Product Features: Material: HSS Bi-metal Color: Blue for choice. Diameter: 92 mm Cutting depth: 30 mm Hole saw mounting 1. Insert the