This Mill is in perfect shape, there are some chips in the bits, but they can be flipped and spun for 8 different fresh cutting tips.The fourth picture shows the 4.00" diameter of the bit tips.The last picture shows the  1.500" arbor bore pilot size.The second from last picture shows the 2" diameter step for the retaining bolt. I have many other shell mills for sale also..Go to my ebay store and put in those key words to see them all..Also many Cat 50 40 NMTB50 40 and other brand tool holders.Also Lathe bit tool holders 1" square and others..I can combine shipping if you are interested in more than one item..I will ship right away