Bought these a couple of years ago and ran them for about a year. They are bolt or weld on sliders. I had to notch one of the mounting surfaces to clear a frame rivet, but there's still ample room for bolting or welding.
Selling because they stick out from the cab a little more than I'd (my wife) like(s). Gonna try to get some that are a bit tighter against the truck. There's a little surface rust that'll come right off with some steel wool.
They are for 05+ Double cab / short bed.
I'm in NC and would prefer to NOT ship these, although I will on the buyer's dime.