See all pictures for the best description. The first one, the one on the left, has a 1-1/8″ shank and takes threading 16IR inserts, 2nd one has a 1-1/8″ shank, and is Indexible 2FL and not sure what type that insert is. The 3rd one has a 1-3/8″ shank and takes CNMG inserts, and the 4th has a 1-3/8″ shank and takes CCMT inserts. You will get all new, 10 pack of 16IR carbide inserts, 8 pack CNMG inserts, and 6 CCMT Inserts all shown on the top.