Professional Quality: The bimetal hole saw is crafted from M42 high-speed steel, renowned for its strength and wear resistance. Its high-speed steel teeth undergo heat treatment, achieving remarkable hardness (65HRC), ensuring reusability and durability. Chip Removal Design: The pre-drilled holes facilitate chip removal, enhancing the efficiency of removing cylindrical iron chips from the hole. Easy to Use: With its clean-edged design, this hole saw simplifies cutting tasks, making them easy and effortless. A spring around the drill bit automatically ejects the washer from the saw upon completing the drilling process. It can be easily used with standard adapters in all drills equipped with SDS-plus or hex chuck. Wide Range of Applications: Hole saws find extensive utility across various materials such as wood, plastic, aluminum, non-ferrous metals, copper, and gypsum board. Compatible with shore drills, electromagnetic drills, gun drills, electric hammer drills, etc., offering versatility and convenience in usage. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.