During a recent project using a classic countersink, I became frustrated with the rough cut, clogging and burning in some nice hickory. I said to myself, We can do better." We did! You will be pleasantly surprised with the performance of these new CleanStop^™ countersink bits. I guarantee it!"
-John Wirth, Jr., President of Woodworker's Supply

Redesigned countersinks have chip clearing flutes the entire length of the body, creating a channel to allow chips to clear from even the deepest counterbores.

Countersink bodies are heat treated to R64C hardness for long life.

Four sizes of countersinks bore pilot holes for #6, #8, #10 and #12 straight shank wood screws. Product description numbers specify woodscrew hole sizes in hardwood., e.g. #6 means ideal for #6 screw in hardwood, and it will work well for # 8 screw in softwood.(A convenient size reference chart is included in the set.)

Countersinks have 1/4" hex shanks with a quick release notch on the #6, #8 and #10 sizes. The #12 size has a straight hex shank.

New SlipStop™ non-marring collars feature a 'window' on each side that aligns with the chip clearing flutes to provide extra clearance to remove drilling waste.

The set includes all four sizes of Cleanstop™ countersinks, a small windowed SlipStop™ collar for the #6, #8 and #10 sizes, a large windowed Slipstop™ collar for the #12 countersink, a hex wrench to mount the Slipstop™ collars and adjust the drill bit depth and a size reference chart.

The new storage case features an attractive burl finish, rare earth magnet catch and fitted foam interior to better protect the components.

U.S. Patent #5,795,110. Other patents pending

Stop collars made in USA; countersink bodies imported.

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Sizing Reference Chart ~2MB