High-Quality Material: This hole saw set is crafted from premium HSS high-speed steel and bi-metal steel, boasting sharp edges and high hardness for exceptional strength and durability. Precise concentricity ensures uniformly sharpened teeth, extending the lifespan of the holesaw. Effortless Cutting Design: The metal hole saw features a snag-free design with clean cuts for smooth and easy operation. A built-in spring automatically ejects the saw blade immediately after the hole is complete. Sharp, Durable Teeth: The high-speed steel drill bit set provides impact-resistant teeth that resist wear and tear. The sharp tooth design minimizes vibration and allows for quick compensation during hole opening, ensuring stable operation. Efficient Chip Removal: The newly designed chip removal groove quickly clears debris, improving the speed of cylindrical iron chip removal and preventing cracking or jamming. Wide Range of Applications: This hole saw set cuts through soft steel, stainless steel, cast iron, brass, aluminum, wood, and more. Ideal for installing locks, door and cabinet knobs, or drilling larger diameter holes in various applications, making it an essential tool for home improvement and repairs. Premium M42 Hole Saw: 100% brand new and high-quality, the blade edge is resistant to chipping, ensuring strength, durability, sharp cutting, and an excellent finish. Utilizes heat-treated bi-metallic M42 saw band material. The wood hole cutter offers dual functionality, wider material application, more uniform chip removal, and faster cutting speed. Compared to standard variable tooth hole saws, it boasts a 30% longer lifespan and reduced vibration for more stable and durable performance across a wide range of cutting diameters. Includes: 1 Hole Saw, 1 Drill Bit