The blades on these are 9/16", sometimes use the 11/16" if I want to slow the drop speed even more. I use 3/32" beads on baits with a #2 or smaller sickle hook but think a 1/8" would be better with a #2. I bought the beads in bulk, 1000 ct. They aren't countersunk like the beads at the fly shops. Both holes appear to be the same size. I have a bunch of smaller propellers in 7/16" that I use with a #6 or smaller hook. I bought 1000 each of those in gold, nickle and brass and would sell some for less than half what you would pay at the fly shops and throw in some beads as well. I'll never use them all in my lifetime. I believe baits like this would be a difference maker in a crappie tournament fishing vertically in timber. I've seen what they can do and I only fish from the bank or wade.