I made up a reference chart for the Craftsman Micro-Positioning Device (probably works with the ryobi badged one as well, I assume they're the same) for my own use and thought someone else might find it useful as well. It'll print nice if you use a fixed pitch font (e.g., courier).
http://www.sears.com/shc/s/p_10153_12605_00922214000P
1/4 turn = 1/64
1/2 turn = 1/32
3/4 turn = 3/64
1 turn = 1/16
1 1/4 turns = 5/64
1 1/2 turns = 3/32
1 3/4 turns = 7/64
2 turns = 1/8
2 1/4 turns = 9/64
2 1/2 turns = 5/32
2 3/4 turns = 11/64
3 turns = 3/16
3 1/4 turns = 13/64
3 1/2 turns = 7/32
3 3/4 turns = 15/64
4 turns = 1/4
4 1/4 turns = 17/64
4 1/2 turns = 9/32
4 3/4 turns = 19/64
5 turns = 5/16
http://www.sears.com/shc/s/p_10153_12605_00922214000P
1/4 turn = 1/64
1/2 turn = 1/32
3/4 turn = 3/64
1 turn = 1/16
1 1/4 turns = 5/64
1 1/2 turns = 3/32
1 3/4 turns = 7/64
2 turns = 1/8
2 1/4 turns = 9/64
2 1/2 turns = 5/32
2 3/4 turns = 11/64
3 turns = 3/16
3 1/4 turns = 13/64
3 1/2 turns = 7/32
3 3/4 turns = 15/64
4 turns = 1/4
4 1/4 turns = 17/64
4 1/2 turns = 9/32
4 3/4 turns = 19/64
5 turns = 5/16
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