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- Drill Doctor Model SB
- Sharpens twist drill bits 3/32" to 1/2"
- Sharpens spade bits 1/4" to 1- 1/2"
- Sharpens masonry drill bits up to 1/2"
- User-replaceable diamond sharpening wheel
3-year warranty on all DRILL DOCTOR™ components; excludes abrasives. Warranty for consumer not industrial use. *NOTE: Using a 115V machine in a location with 230V power sources voids your warranty. For use outside North America, please select "WHERE TO BUY" in the CUSTOMER SERVICE menu at the top of the page to find a distributor in your country or region.