Our micro drill bits are great for precision drilling wood, plastic, and soft metal. This set includes a swivel head pin vise drill and 100 micro drill bits sizes 61-80. For each size bit a labeled tube contains 5 micro drill bits. To keep your precision drilling set organized, our convenient wooden storage case has marked spots for each tube. These small drill bits can be used with any rotary tool but work best with a pin vise or push drill such as our Push Drill (#403) and Mini Push Drill (#402)