Best way to stitch a BUTTON [by hand and by sewing
2020-1-22 · The flat, broad blade of a spade bit has a pilot point attached to a 1/4-inch diameter shank that can be chucked into both regularly-chucked drills and quick-chuck impact drivers. Each edge of the flattened portion of the bit is sharpened, and the bottom corners of the sharpened area may have a pointed tip, depending on the style and brand of the bit.
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