... sealed bearing. These bits can be available in open bearing. 4. All come with regular API connections. These bits feature ... industries.6. We offer both standard high quality re-tips and premium quality re-run as well as NEW and ... 8,4 1/2,4 5/8,5 1/2,6 ,6 1/2,6 3/4,7 7/8,8 1/2,8 3/4,9 1/2 ... ,9 5/8,9 7/8,10 5/8,12 1/4,13 3/4,14 3/4,14 ... 5/8,16,17 1/2,20,22,23 ,24 ...