The Firstlaw Fitness I-Beam Mount is the strongest fitness I-Beam Mount you can buy. Its the best way to hang heavy punching bags, climbing ropes, gymnastic rings, from a steel I-Beam. The unique design does not have any welds that can crack and brake over time. The center plate is made from hardened steel and supported by (2) 1/2" grade 5 bolts. 100% made in the USA and ships from our location in Pennsylvania. The Firstlaw Fitness I-Beam Mount comes with a lifetime warranty.