![]() In 0.5 mm increments, any hardware store. Sets of bits in 1 mm increments might be found on a market stall. Bits at size increments of 1 mm are most commonly available, and lowest price. The price and availability of particular size bits does not change uniformly across the size range. This reflects both the smaller drilled hole diameter tolerance possible on smaller holes and the wishes of designers to have drill bit sizes available within at most 10% of an arbitrary hole size. In smaller sizes, bits are available in smaller diameter increments. For example, British Standard BS 328 defines 230 sizes from 0.2 mm to 25.0 mm.įrom 0.2 through 0.98 mm, sizes are defined as follows, where N is an integer from 2 through 9:įrom 1.0 through 2.95 mm, sizes are defined as follows, where N is an integer from 10 through 29:įrom 3.0 through 13.9 mm, sizes are defined as follows, where N is an integer from 30 through 139:įrom 14.0 through 25.0 mm, sizes are defined as follows, where M is an integer from 14 through 25: Standards organizations define sets of sizes that are conventionally manufactured and stocked. Metric drill bit sizes define the diameter of the bit in terms of standard metric lengths. The case that holds them in an indexed order (by size), via a graduated series of holes, is called a drill index. Metric drill bit sizes Metric drill set, 1.0–6.0 mm by 0.1 mm, jobber length. Ī comprehensive table for metric, fractional wire and tapping sizes can be found at the drill and tap size chart. ![]() The British Standards on replacing gauge size drill bits with metric sizes in the UK was first published in 1959. In nearly all other countries, metric drill bit sizes are most common, and all others are anachronisms or are reserved for dealing with designs from the US. In the U.S., fractional inch and gauge drill bit sizes are in common use. They can be made in any size to order, but standards organizations have defined sets of sizes that are produced routinely by drill bit manufacturers and stocked by distributors. Please note the if orders are placed by mistake and we are required to refund the order amount, we won't refund the payment service fee.Drill bits are the cutting tools of drilling machines. Please remember it can take some time for your bank or credit card company to process and post the refund too. If approved, you’ll be automatically refunded on your original payment method. We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item. Unfortunately, we cannot accept returns on sale items. ![]() Please get in touch if you have questions or concerns about your specific item. We also do not accept returns for hazardous materials, flammable liquids, or gases. Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item so that we can evaluate the issue and make it right.Ĭertain types of items cannot be returned, like custom products (such as special orders or personalized items), and personal care goods (such as beauty products). ![]() You can always contact us for any return question at and issues Items sent back to us without first requesting a return will not be accepted. To start a return, you can contact us at If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. You’ll also need the receipt or proof of purchase. To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
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