MTM Ammo crates are the perfect storage solution for a variety of storage needs including shooting, hunting or survival gear, as well as ammunition. One of the features that makes them exceptional is the tongue and groove O-Ring seal system for a superior water-resistant dry storage. These crates are constructed of high-impact polypropylene plastic and have two extra strong handles that make it easy to carry 65 pounds of gear. They are designed to be stacked high, using molded-in stacking ridges. They also have four tie down points for ATV attachment.