I typically use the 3/4 size, but Ive had some pull off, and some stay on. Ill take the blame for this - its possible that I didnt clean the surface well enough. I never knew they came in a larger size, so when I saw these, I thought the larger size would create a larger area for the adhesive. So far, so good. Ill let ya know in several years whether theyre still attached or not!

These are nice because the hold the wires, but, they dont stick very good at all.. I cleaned every surface before sticking these on the aluminum and they all fell of with in a month.. I ended up using hot glue to stick them back on and they havent fallen off yet.