IRONMAN™ Bi-metal hole saws from IDEAL® INDUSTRIES, INC, with re-engineered bi-metal construction, a thick ''flex-free' backing plate, and variable sized teeth, IDEAL® IRONMAN™ hole saws will rival the cutting speed and longevity of any in the industry. The bi-metal construction cuts metal, wood and plastics including: tool and stainless steel, nail embedded wood, plywood, and pipe. An extensive list of 51 sizes, effective accessories, and kits are available to meet all your cutting needs. When it comes to quality, performance and durability, IDEAL® is the professional's choice for hole saws.