I have three different brands of wrenches, two sets of seven and one set of ten, so I ordered (2) - 7 wrench holders and (1) - 10 wrench holders. For two of the sets I own, model 5081 - 7 key holders hold nothing but small keys, very well. The keys should be fairly thin for the 5081 holder. It holds my Craftsman keys until I get to the 5/8" and 3/4" keys, they are too thick. The 5049 model holds most keys very well. I think I can return two 5081 holders and get two more out of ten key holders.