The TOC BenchBags are made with made with premium quality materials and are GUARANTEED FOREVER. The design creates a steady platform and grips the rifle forend like a soft vice for stability. The bags are designed to be heavy enough for support of large caliber rifles, yet light enough for transport. Your expensive rifle is carefully held in place and no metal that could mar the finish comes in contact with the firearm. Use your BenchBags at the range, in the deer stand or on any surface to hold your gun steady.