The Blu-Mol X Bi-Metal Holesaw M3 is a 51mm cutting tool featuring tough high-speed steel alloy teeth bonded to a welded steel body for safe, efficient cutting through stainless steel, carbon steel, hardwood, and plastic. The bi-metal construction combines durability with precision, reducing wear and extending tool life across demanding applications. Ideal for electricians, plumbers, and construction professionals requiring reliable hole-cutting performance on multiple material types.