They are supplied with several different lengths of Velcro straps to hold both small and large items. These extremely strong arms are machined from aircraft quality aluminum so that they are strong enough for virtually any size cooler, duffel bags, toolboxes, camping gear, etc. A roll cage with a horizontal bar either located in front of or along the side of the bed are required to properly use this mounting system.When not in use they can easily be rotated up and out of the way for more rear passenger leg room or other cargo. This item is in the category "eBay Motors\Parts & Accessories\Other". The seller is "mxstuf4u" and is located in this country: US. This item can be shipped to United States, Canada.