U-Bolts SIZE：The Square U Bolts measures about M12 in diameter, 2-1/16" W x 6-1/2" L, Stitable for 2" x 6" square beams and shafts, 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 4 pcs of U bolts 2-1/16 inch wide, plus 4 pcs of frame plates，8 pcs of flat washer，8 pcs of lock washer and 8 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, cars, sailboat 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