Designed by PRO Mountings the I-Beam Roller track is designed for use with the IB-010R (4.5") I-Beam Roller Mount. The interlocking design allows you to connect multiple lengths of track. The I Beam Roller is excellent for all style fighters..MMA Fighters, Boxers, Muay Thai Fighters and Kick boxers.For Heavy Bags up to 250lbs!THIS LISTING IS FOR THE TRACK ONLY.Fabricated from 3/16" steel plate for superior strength!!Can be mounted to open ceiling joists, drywall or concrete surfaces.Special interlocking ends allow for addition of multiple track sections600lbs weight capacity per 4 Foot section. Mounting hardware included!Designed by PRO Mountings and made in the USA!! Lifetime Warranty!