I used the Command medium wire hooks to hang a large 6-foot Christmas wreath on my aluminum/vinyl picture window and did not have to put holes into the trim for screws or nails. The hooks held the heavy lighted wreath tight for the 3rd year and I've left them on the window frame all year long. I've only had to replace 2 glue strips for the 2 that carry most of the load. The glue strips remove easily if they are to be removed, but the hooks aren't noticeable, so they are ready to go when the wreath comes out of storage. [This review was collected as part of a promotion.]