This all-welded steel wheel chock is designed to secure rail cars during loading and unloading. Chock fits most standard rail sizes. Double-sided flange helps keeps chock on the track. Hardened steel spurs are located at the bottom of the chock to maintain positive grip. Flag Rail Chock features an aluminum "Chock Your Wheels" sign that is visible on both sides and a handle that projects 36". This combo chock's chain length is 30".