6Pack 4“ x 2-1/2" Square U-Bolts, 304 Stainless Steel U Bolts with Plates Nuts Flat Washers, M10 Round U-Bolts for Car RV Trailer Bumper Ski Boat Fishing Boat Sailboat Trailer - Versatile application: Ideal for fixing or connecting locked parts to pipes, wood, etc. Perfect for trailer boats, plumbing, roof baskets, and RV bumpers -These square u bolt are resistant to rust, corrosion, and can withstand weight, even in rainy and wet environments. -2.5 inch width, and 4 inch length of this square U bolt make it suitable for various fastening needs. Please check the size before ordering. Package includes: 6 x U-Bolt, 12 x Nuts, 12 x Round Washers 6 x Plates Warm Tip - It is advisable to use a lubricant (not included) when installing square U-bolts. - When installing nuts, use a hand wrench or a socket ratchet (not included). - Do not use high-speed power tools or impact tools (not included) to tighten nuts.