Customers have long signaled their desire to have multiple copies of the most useful drill bit sizes available - in case one breaks, goes dull or gets lost. Our 170 and 230 piece special sets provide that. However, for the first time, we have very small twist drill sizes too. This useful set includes 10 each of 5 HSS mini drill sizes - 1/16, 5/64, 3/32, 7/64 & 1/8". Imported. Highly recommended.