The Hammock Quick-Connect Buckles are designed for fast set-up and easy adjustment. The pair of buckles are connected in a split second but offer infinite length adjustment so you can achieve the most comofrtable hang. One buckle of the pair is bartacked to the hammock while the second buckle is threaded through the Suspension Strap webbing. Pro hammocks use 3mm steel buckle with Nickel plating. The Ultralight hammocks are supplied with 3mm buckles made from lightweight, aircraft aluminum alloy. Compared to traditional carabiner to loop connections, Quick Connect buckles are more compact, lighter, and offer more adjustment.