Amazon.com Review
Instead of throwing away old, dull bits, give them a checkup with the Drill Doctor and extend their life. Although drill-bit sharpening systems often fail to live up to our expectations, we're here to bear witness for the truth of the Drill Doctor's claims: it really does sharpen old bits in just a couple of minutes. The 250SP (Drill Doctor's Handyman model) sharpens conventional tipped bits and masonry bits from 3/32 to 1/2 inches in size at a 118-degree angle. It makes a great addition to a home shop and the do-it-yourselfer's toolbox. For people who need to be able to sharpen split-point bits or sharpen at a 135-degree angle, Drill Doctor's 500SP and 750SP models might be a better bet. Operation is fairly simple, but to make sure no one has trouble figuring it out, a how-to video is included. Anyone who frequently wears down drill bits is going to appreciate the savings this handy machine can offer. Using sharp bits instead of dull ones also increases the life of your drill, because sharper bits require less work to make the same hole. We only wish we'd found the Drill Doctor sooner. --Brian Trinen
From the Manufacturer
Why be dull? Sharpen your drill bit. The Drill Doctor uses a diamond wheel to sharpen drill bits into high-performance points from 3/32 to 1/2 of an inch. The sharpener is double-insulated with an impact-resistant plastic casing and a 6-foot power cord (120 volts). Darex makes drill-bit sharpening affordable.
