When it comes to purchasing a bi-metal hole saw, look no further. The IDEAL® bi-metal hole saw utilizes M42 high speed steel with 8% premium cobalt and a rigged solid back plate. Providing 2.3X more holes than leading manufactures with the highest strength and greater wear resistance. The extreme deep gulleted teeth design clears out uniform chips that minimize binding on the job that provides 1.2X faster drilling time than the leading manufacturers in the market. With a standard 1-7/8 in cutting depth, you can save time cutting 2 x 4 ft with a single pass design. The IDEAL® bi-metal hole saws effectively cut through a wide range of materials, including stainless steel, sheet metal, as well as common non-ferrous materials, such as aluminum, copper, brass, wood, engineered wood, nail embedded wood and plastics. When it comes to IDEAL® vs. The competition, we have the professional in mind. The wide offering includes sizes from 7/8 to 6 in that include diamond side eyes to provide ease of slug removal. The 2 to 6 in bi-metal hole saws have large cat eyes on the back, that not only provide line of sight but aid in plug removal. IDEAL® is the professionals choice for bi-metal hole saws.