As a jeweler you really should be using metric drill bits. Period, end of discussion. But I decided that I should include additional information as it makes the discussion complete. A common standard for metric drill sizes is the Renard series, which uses a simple factor to determine the diameter. I will not go into that as most jewelers use very small drill bits. I personally rarely ever use one over 5mm in size. for me, as a general rule, I tend to buy my drill bits in sizes that allow me to set round gems. The drill bits that I use every day range in size from 0.8 mm (0.0025 ct) to 5.0 mm (0.50 ct) in diameter and I tend to buy them in the sizes closest to the gems I set.

If your Michaels purchase does not meet your satisfaction, you may return it within two months (60 days) of purchase. To return an item, the item must be new, unused and in its original packaging. Please see full return policy for exceptions and return methods.

Most products are shipped via standard ground. Orders placed by 11:00 AM Central Time using the Expedited option will ship the same business day.