Drill Bits Buying Guide | Lowe's
2021-4-12 · Drill presses also have larger chucks, 1/2 inch or 5/8 inch, for example. The bit shank size must not exceed the chuck size of the drill. A larger bit may have a reduced shank — a shank with a smaller diameter than the body of the bit — allowing you to use it with smaller chucks. A round shank allows you to accurately center a bit in the chuck.
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