High quality material: It is made of high quality aluminum alloy and stainless steel.The surface of the buckle is painted with paint, which is not easy to corrode, and the whole is not easy to deform, sturdy and durable, which can effectively prevent outdoor camping tentto fall. Non-slip and Adjustable Spring: These patio nails are designed in octopus shape, and the bottom double hook creates better stability and prevents the nails from falling or rotating due to tent shaking. The shape of the telescopic spring can be adapted to boards of different thicknesses. Easy installation: The D-shaped carabiner is attached, which is convenient for fixing the tent on the octopus deck nails. The installation method is simple. Just insert it into the gap and do itrotate to secure.Binding with D-shaped carabiner and tent rope Wide application: It can be used to set up and fix tents and awnings on decks or wooden boards during outdoor camping or gardens and balconies. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.