The 6-in-1 Brush will clean the ID of 1/2 and 3/4 in fittings and OD of 1/2 and 3/4 in tubing. It will also ream and deburr the ID of tubing to meet most key plumbing/building codes. It is heavy duty in construction, long lasting and features replaceable components. It also features a handy B tank key.