•  Bimetal: Dissecting the Classic All-purpose Hole Saw

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    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.



    The new SPEED SLOT Hole Saw
    The patented SPEED SLOT Hole Saw features a wide staircase design and has multiple leverage points to easily eject the plug in half the time.

    • 10% taller for faster plug removal in 2" lumber
    • Thin kerf & advanced tooth design give 2X life
    • Ejects saw dust & chips for 2X faster cutting
    • Bimetal construction for cutting wood or metal


    For smaller holes — 2" or below — a good 18 or 20 Volt battery-operated drill should have plenty of power. Holes between 2" and 4" will need a more powerful corded drill. And holes 4" in diameter or larger require a 90° drill with a locking outrigger handle.