Multiple Carriage Function: This set of roof kayak carrier can be put into kayak on one side, and the 4-piece carrier is easy to transport one or two kayaks, making it more convenient and easy for you to enjoy your vacation. Stabilizing J-Shape Design: The J-shape kayak carrier is designed at an angle of about 45°, which is highly compatible and allows most different styles and shapes of kayaks to fit as tightly as possible on the carrier, together with our extra-long greater than 8.9' / 2.7 m strap with compression buckles for securing, the kayak stays stable during transportation. Easy To Install Universal Roof Rack: This rack needs to be mounted on the roof beam or roof bars, and it is compatible with most of the roof bars on the market, round bars Φ1.0" - 1.6" / Φ25 - 40 mm, flat bars 0.6" - 1.6" / 15 - 40 mm thick, and the width of the bar rack <3.9" / 100 mm can be mounted. It is easy to install by tightening the screws at the bottom to fix it to the top bar. Strong & Heavy Duty: Our racks are made of high-strength thick alloy steel and high-quality plastics, the whole set of racks can withstand a dynamic load of 150 lbs / 68.0 kg, which makes it easy to load a large kayak without deformation or damage. In addition, our racks are added with rust-resistant coating for a long service life in the wind and rain. Note: Please check the load capacity of your car roof and crossbar rack when using to avoid crushing the roof. Reduce Scratches: Wear-resistant plastic small brackets as well as thick oversized soft cushions attached to each bar effectively prevent kayak rubbing and damage, and provide full protection for the crossbars and kayak roof rack. 2 Pairs Package Content 1 x Open End Wrench 14 8 x M8 Plain Nuts 8 x M8 jam nuts 8 x Round head square neck screws (carriage bolts) M8x80 8 x Round head square neck screws (carriage bolts) M8x35 24 x M8 flat washers 8 x Plum hand nuts 4 x small brackets 4 x Tie-down straps with press-studs (>8.9' / 2.7 m) 8 x M8 spring washers 1 x Instruction manual 1 Pair Package Content 1 x Open End Wrench 14 4 x M8 Common Nuts 4 x M8 jam nuts 4 x Round head square neck screws (carriage bolts) M8x80 4 x Round head square neck screws (carriage bolts) M8x35 12 x M8 flat washers 4 x Plum hand nuts 2 x small brackets 2 x Tie-down straps with press-studs (>8.9' / 2.7 m) 4 x M8 spring washers 1 x Instruction manual