"...excellent chip-clearing capability"...
"Every hole was drilled cleanly in one shot..."
Fine Woodworking Tools and Shops Winter 2008-09

"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.

Countersinks with drill bits, stop collars and replacement drill bits are sold individually.

965-253 includes the 151-337 countersink bit set and four replacement pilot bits.

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