I have a very old (20 plus years) Craftsman 1/4 sheet sander. I got it because you could cut down full sheets and clip them to the sander.  Well after 20 years the clips are just plain worn out and no longer hold the sheets in place.  Well 1/4 sheet adhesive backed paper is WAY too expensive, and I have not found any full sheet sticky back.  I was just about to toss the sander in the garbage when I stumbled across these rolls.  I decided to give them a shot and I'm so glad I did.  The adhesive sticks well to even my 20 year old rubber pad.  The sandpaper is very durable and long lasting.  I'm using this mainly for wood, but won't hesitate to go after metal or fiberglass (should the need arise).  At only 20 cents a pop this is one of the most economical adhesive backed options around.  I'm gonna have to order a couple other grits cause this stuff is great.