Extension for self feed drill bits. 7/16 in. x 5 1/2 in. Made of steel. Provides more reach. Quick change.
- For drilling large diameter holes in wood for pipe, conduit and other applications
- Replaceable coarse screw point drills quickly in dry, wet, and gummy wood
- Precision milled shank eliminates runout and wobble
- All bits have a 7/16-in hex quick change impact shank that fits 1/2-in or larger electric drills or 7/16-in hex impact wrench drills








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