The way I build mine is with 3 2x4. ,you make a cross with 2 of the 2x4 around 18" long each.Then with the last 2x4 you run it upward with around a 26-28" piece.You run romex over the top piece from each direction and staple the wire under the bottom and on the side.At the top of the wire wheel you will need to put a small slice in the wire to run a bent nail with a hook in it faceing the top and what I use is a hanging bar with a washer under the romex at the top and the nail goes through the washer and the hanging bar then through the romex and the hook will always be on top and drive a staple in a closet door header or a window opening and pull wire.Usually takes me 10 minutes to make this helpful tool and beats the $100 bill for a good one it lasts a good 6 months depending on handle and care.