This pair of Allen U-Bolts with lowers and bottom backing plates is designed with a 6mm rod and 22mm internal width, shaped like the letter "U" with threaded ends. These bolts are ideal for use on boats, providing a secure attachment point for lines, hardware, and rigging. Each pair includes two U-Bolts, four nuts, two backing plates for the underside of the deck, and two lower shroud attachment plates, all made from marine-grade stainless steel.