While there is a range of innovative specialty hole saw designs on the market, many professionals rely on the flexibility and utility of a daily-use saw that can tackle wood cuts as easily as metal Sheathing. Enter the classic bimetal hole saw.
As reported in Taunton's 2011 Tool Guide from Finewoodworking.com, "Bimetal hole saws have high-speed steel teeth fused to a carbon-steel body. The tooth is equally suited for cutting wood and metal, making this type of hole saw the closest thing to all-purpose."
While tooth design varies from saw to saw, standard multi-purpose designs can handle a range of materials. The key is in the aggressiveness of the tooth design itself. If you're cutting a hidden spot in wall framing or ducting, a more aggressive tooth shape can save time. Some saws are also designed to chew through hidden nails and other tough materials during remodeling jobs.
But for finish cuts in walls, flooring, cabinets, and other places that will be visible, a smoother cut is well worth it taking a few seconds longer. For these cuts, a finer tooth design will reduce the amount of finish work needed.