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Whiteside's 82° countersink heads are designed to slip over the drill bit and affix with dual set screws into the flutes. Adjust the drilling length by sliding the head up or down the bit. Use to countersink holes in wood, plastic, or aluminum for flat head screws.

Sold Separately: Upgrade to the High Speed Steel series for longer life, especially in fiberglass or other abrasive materials. Matching drill bits Jobber & Taper Point are offered for your convenience.