what are these?

can someone explain to me what these are and how do they work. thanks

http://www.streetsourcemag.com/uploads/Ownerprofiles/Tucking20s/9182005103800PM23541.jpg

there riviots that hold the metal in place

no those are called clecos. They hold the metal in place while you install fasteners or weld it in place. You drill a hole in two or more pieces of metal and put a cleco in the hole to keep it all from getting mis-aligned, until you get the two or more pieces bonded together.

rivets are fasteners that get shot and bucked, or you can stick a pull rivet in it and pull it with a gun.

It looks pretty sweet anyway!

how big are the holes you have to drill to use them? i like the concept, but finishing it w/ that many holes would be a pain!

The ones I used in that application require a hole 1/8" in diameter. They are ured to attatch the floor to the substucture. I enlarge the sheet metal hole to 3/16 before welding and leave the 1/8" hole in the substructure...starting my weld in the center of the 1/8" hole

hey tucking20's any updated pics on your car i'm dying to see the progress

ther better used if u punch the hole instead of drillin that way u dont distort the metal to bad...

I got them in 1/8 + 3/16 you can get them in a bunch of sizes. The were made for aircraft building, at least thats what i was told. Got mine from our Mac Tools guy.