The nice thing about Rubbermaid FastTrack Power Tool Holder/Rail System is the Rail itself, it's 48 inches long and you mount it from stud to stud and the hooks being attached to the rail, you can slide or space your hooks how ever you want to accommodate the tools you want to hang and you don't have to have a stud for every tool you want to hang or in my case drilling into concrete. One Rail can hold five trimmers.