General description This high-speed variable pitch bi-metal hole saw is designed for precise cutting of round holes in metals, plastics, and wood up to 35mm (1.3/8”) deep. It features a hardened M3 steel cutting edge welded to a durable alloy steel body, ensuring long-lasting performance and reducing the risk of shattering. The hole saw includes four side slots for easy removal of debris and a female threaded spindle for secure attachment to a 9.5mm arbor. It can be easily mounted on power drills for fast, clean, and heavy-duty cutting, even in tough materials. Technical specifications Cutting depth: up to 35mm (1.3/8”) Material: Bi-metal with hardened M3 steel cutting edge Body material: Alloy steel Number of side slots: Four Threaded spindle: Female, compatible with 9.5mm arbor Compatibility and accessories Compatible with standard power drills Requires a 9.5mm arbor for mounting (sold separately) Installation Attach the hole saw to a compatible arbor Secure the assembly onto a