... 2. Large inventory on hand 3. Low cost 4. Can be customized 1. Come in many shapes and sizes with multiple ... bearing. These bits can be available in open bearing. 4. All come with regular API connections. These bits feature ... 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 ...