The tool is fine except for one not so minor issue. It doesn't do you any good if you can't read the writing. This thing is taken straight out of the mold, packaged and sold. It wouldn't take anything to roll a paint roller over the raised lettering. The tool cost $6.95 now. I'm sure most would pay $10.00 to be able to read it.
For now, my work around is to simply pull up the pro version online and read the number for the corresponding hole on the plastic one when I need to measure a tip top.
Doable, but very inconvenient!