Doing one of my first high volume jobs. It's for a friend, but for a job that he's doing, so I just want to be fair. The outer diameters are roughly 1.5" and the inner holes are roughly 3/4". I also pierced the 3/16" screw holes.
I'm coming up with approximately 1.00, .80 and 1.60 respectively each. (top to bottom)
