Convenient Multiple Carrier Function: This 2-in-1 set of roof kayak carriers can fit one kayak on each side of one carrier. Use it to easily transport two kayaks without the need to buy multiple sets of holders, making it more convenient and easy for you to enjoy your vacation with your partner, family and friends. Quick Folding Design: Featuring a quick-folding design that allows different styles of kayaks to fit as snugly as possible in the carrier, with our extra-long straps larger than 8.9' / 2.7 m secured to keep the kayak stable during transportation.The 0-180 degree folding range also saves space and reduces the height of the roof when it's not in use. This design can also be used to transport skis, surfboards, small canoes and luggage on the roof. Easy To Install Universal Roof Rack: This rack needs to be mounted on the roof beams or roof bars, it is highly compatible with round bars Φ1.0" - 1.6" / Φ25 - 40 mm, flat bars 0.6" - 1.6" / 15 - 40 mm thick, and the width of the cross bar rack is <3.9" / 100 mm can be mounted, which is compatible with most of the roof bars size in the market. It is easy to install by tightening the screws at the bottom to fix it to the roof bars. Strong & Heavy Duty: Our racks are made of high-strength thick alloy steel and high-quality plastic, one set of racks can withstand a dynamic load of 150 lbs / 68.0 kg, easily load two kayaks without warping 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 your car's roof and crossbar rack's carrying capacity when using it 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, the top gasket reduces vibration and provides full protection for the crossbars and kayak roof rack. Package Content 1 x Open End Wrench 14 8 x M8 Plain Nuts 8 x Round head square neck screws (carriage bolts) M8x80 16 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