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Make it Snappy Tools SD-3 Flat Bottom Counterbores

Make it Snappy Tools SD-3 Flat Bottom Counterbores - Main image
$12.17 $165.4 In stock

Category: Drilling & Boring Drill & Driver Bits

Snappy Counterbores for a One-Step Hole

Countersink bits are great when you're using wood screws with a cone-shaped head. However, if you're using lag screws, lag bolts, washer head screws, T-nuts & more, you need a countersunk hole with a flat bottom to properly seat the screw. That's where the Snappy SD-3 Counterbores are the perfect tool. The 3-flute counterbore creates a pilot hole and counterbores a flat bottomed hole in one step.

The drill bits are high speed steel and coated with Titanium Nitride (TiN) to increase wear resistance. Each counterbore has a 1/4" hex Power Bit shank to work with Snappy's Quick Change chuck.

Another great feature for woodworkers is the oversized set screw for the counterbore. Rather than fumbling around trying to tighten or loosen the screw, this oversized screw makes adjusting the counterbore a simple task. Sometimes it's the little things that make a big difference.

The counterbores are offered in five sizes, or buy the 5-Pc. set with canvas pouch and save!

Sizes Include:

  • 1/8" x 3/8"
  • 3/16" x 1/2"
  • 1/4" x 3/4"
  • 5/16" x 1"
  • 3/8" x 1"
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Thomas S. ★★★★★

The flat bottom leaves a clean seat for lag bolts and washer head screws, no torn fibers like my old countersink gave me. Ran a batch of T-nuts into oak and every hole was crisp and dead flat.

Hannah C. ★★★★★

Bought these for T-nuts in a plywood shop project and the flat bottom cut cleanly without any of the tearing I used to get from a Forstner bit. The pilot stays centered, so my hardware actually sits flush now.

Matthew H. ★★★★★

The flat bottom design means my washer head screws sit perfectly flush without any wobble. Made installing a heavy shelf so much quicker since I didn't have to drill separate pilot holes.