Originally designed as a water bottle storage solution for Wilderness Systems kayaks, the Magna Tech Strap works great in a variety of lifestyle situations. A fully adjustable 38mm Nylon strap and extremely powerful N48 Grade magnet firmly holds items in place. Compatible with most popular water bottles sizes but can be used to secure a variety of other items. Mount the coated steel plate where you need it or simply apply the strap directly to any magnetic metal surface. Use it on your kayak, at home, at the gym, in your car and multiple other places. Easily holds items weighing up to up to 2.5 pounds and with diameters up to 5 inches.