U-Bolts SIZE：the square U bolts measures about M8 in diameter, about 65mm/2.55 inch in I.D width and about 80mm/3.15 inch in O.D length, The OD size of your project can be used to match the suitable U-bolt ID before ordering, please confirm the size before What's included : you will get 8 pcs of U bolts 2.55 inch wide, plus 8 pcs of frame plates，16 pcs of washer and 16 pcs of nuts, 1 Pcs wrench，a complete set can meet your use and replacement Materials : U-Bolts Made of 304 stainless steel, strong, have great performance in rust resistance, moisture resistance, and corrosion resistance Broad utilization : the square U bolt clamp is practical and widely applied in various fields such as industry, manufacturing, maintenance, automotive industry, garment production, etc., which are ideal for fastening pipes, wood, trailers and more Suggestions for use: it is recommended to use oil when installing this U bolt to prevent wear; Can use match manual wrench when fasteners nuts， Avoid using high-speed poweltools or impact tools to break the threads 1