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| Take your time and learn to sharpen them on the bench grinder, make the 2 cutting edges the same angle and length and then grind the heel so you have clearance. Use a new bit for comparison, does not have to be exactly the same as a new bit and they will cut well, practice on a bigger bit then go to the smaller ones. real small ones are harder, esp. if you have older eyes, but they are cheaper anyway. | |
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Drill bits/drill doctor
