25Pcs Steel Multi Grip Rivet Nuts Pre Bulbed Shank Zinc-Plated Flat Head Threaded Insert Nut Construction Fasteners for Industrial (1/4-20)

Very handy for places you need to access repeatedly.

Excellent quality

I have a use for these that will allow them to be used both ways. I'll anchor something to a door and use either a sexbolt or these with a hurricane or sidewalk bolts. It works great and I don't need to worry about it z falling out. I like using these for so many different things.

They worked, but I had to use plyers on the washer head to hold backup to get them set, once set they worked great. How ever there should have been vertical splines or ribs to hold back up til you got them set in place

Amazing tool.