Grooved hex shank prevents slipping. Fits all standard quick change chucks. Cutting spurs - double spurs scribe the outside of the hole which reduces -inchbreak out-inch. Blue-Groove point & cutting edge prevents scraping wood._x000d_ _x000d_ Grooved Hex Shank _x000d_ Cutting spurs _x000d_ Blue-Groove point & cutting edge _x000d_ .
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