-All have a 17/32" hole for the 1/2" bolt.
-All have an overall O.D. of 1.5"
-The collar O.D. Left to Right are 29/32", 11/16", 7/8", 3/4" and on my 108 it is 1&1/8"
-Outside Flange thickness Left to Right are 1/8", 7/32", 5/32", 1/8" and on my 108 it is 3/8"





