The numbers usually range from 1 to 20 (or more) with 1 representing the least amount of torque and 20, the greatest. The Anatomy of a Drill Bit:Overall Length (OAL) – This is the measurement from the base of the drill bit up to the cutting point.Body – This definition may seem basic, but it actually only includes the length of the drill from the outer corner of the cutting lips just to the end of the flutes.More items…Īs mentioned at the beginning of the article, the numbers on a drill represent the amount of torque the tool can apply to an object (such as a screw) or for hole drilling. … Metal Drill Bits: These have a wide-angled point at the end, and they may also be painted black. … Masonry Drill Bits: These bits have a gently sloping tip. If you look closely, you can see spurs on each side.
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