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Includes one each of the following sizes: 1/2", 5/8", 3/4", 7/8", 1", and 1-1/4" Speedbor Max bits. Fastest wood boring bit ever. Tri-Flute design for faster chip ejection. Grooved hex shank prevents slipping in drill chuck or bit extension. Fits all standard 1/4" quick change chucks. Three cutting edges (spurs). Full screw tip allows bit to self feed. Length 6". Carded.