J Hook Tree Components. By stocking just a handful of components, you can create a j hook tree on the fly to fit any situation. Start at the top, decide on your attachment point, be it a beam clamp or angle bracket or if you are going to mount to the wall. Decide on your rail length to fit your required number of j hooks. Will you want a single side or double side j hook tree? If single, use the stamped rails for super fast assembly with just 1/4-20 hardware. If you want a double side, use the thru hole rail and a mount one side with longer screw and nut and then attache the other side with a nut. The versatility of the HPH j-hook tree system is incredible!