[bkozlow]

Have the tool you showed, not really crazy about it. Go back to my old standbys of double 3/4 wrench system. Look at aircraftspruce.com go into tools and put in rivnut tool or part number 12-13700. This should get you to the correct place and see the different sizes available. This type tool lets you get into many place the tool you pictured does not and you have better control of the crunch with the wrench type tool. Remember, if you clamp to tite you destroy the treads and then have to drill out the fastner. Also, the best way to do them in fiberglass is to use a washer underneat if you can get in there.

bill k