We have developed several heavy duty corner wheel and bracket assemblies for different situations. The bracket is made of ¼" galvanized steel and has a 1½" schedule 40 center post to take lots of punishment. All brackets include a heavy 12" vinyl inflatable wheel and a special hub for wear. These wheels are great for docking, especially when high winds and current make docking difficult. Comes with all hardware to attach to dock. Use the DW-12 or DW-12WD for corners, and use the DW-12S for a side mount option. The DW-12HE and DW-12HLE are used with new construction of wood dock.