Our single pipe holder is designed to be mounted to a stationary piling, and used in sets of 2, to hold a piece of 2-1/2" sch 40 pipe (provided by customer) in place. The pipe you provide should be no longer than 10' in length. The H-SPH has 6 bolt locations to accept a 1/2" lag bolt in 4" or longer. The bracket has two set screws (provided) but also has a thru hole, pre drilled, should you find the need to bypass the set screws and mount your pipe solid. Hot Dipped Galvanized after fabrication.