Specifically designed for use with stack jacks, fifth wheel stabilizers, swing down stabilizers and awning arms to keep them from sinking into soft ground. Interlocking for convenient storage with handy strap. Built in handle for easy use. Solidly constructed of durable polypropylene with UV inhibitors. Each pad measures 9”H x 6-5/8”W x 2-3/4”D. 4 per pack.