I can tell you something that ***** more. When those bite too much or the wrong way and basically you have reamers because they didn't set right. Drilled out plenty of that type and I don't like them at all. The best are the square, notched, or hex style but you have to have $$$ for that kind of setup.Nothing ***** more than removing a screw later and having the nutsert spin in the hole. I might also suggest you consider the rivnuts with the serrated flange so they bite into the material when pulled.
Mine are simple and work!
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James
probably have a total of like 20-30 to do max, going with m6-m8 size serts, are those hand ones capable of doing those?
thanks
i will be better at searching from now on.
Anybody else get a kick out of the name "Nutsert"? [emoji12]
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hi guys Kimball Midwest is the company
#5/16-18 Tric-Nut Insert Conversion Kit
For Use With Tric-Nut Insert Installation Tool 85-051
Package Quantity: 1
you don't need a special tool to use it
James
types...especially if you have a lot of Rivnuts (nutserts) to install. We use the serrated style Rivnuts (nutserts) and NEVER have issues with them spinning
. I would venture to guess that we have installed at least 10,000 Rivnuts (nutserts) over the past ten years, so I'm not blowing smoke here. 
Mine are simple and work!
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Lawson
James