you'll notice that the relief edges at the back of the drill bit's flanks (above) are at a slightly different angle to the axis of rotation. The back edge is closer to the center of the bit ...

Fortunately, bringing your drill bits back to life takes minimal effort. Drill bits can be sharpened by hand or with a bench ...

But when a drill bit breaks off flush in a hole, there aren’t a lot of options, especially for a small bit. If the stars align, though, you may follow this video guide to dissolve the drill bit ...

Twist drill bits. Especially in steel thicker than ¼ ... there’s a good chance it’s going to kick back and give you a sore wrist. 3. Annular cutters. Designed to cut large-diameter holes ...

We drilled two holes, in a concrete block, one with each hammer drill, using the same type of 3/16-inch masonry bit to demonstrate how they both perform. As bit diameters get bigger, the ...