Great training aid for introducing horses to hobble pressure. These shackles also provide resistance to help teach muscle memory and improve horse condition. Features nylon reinforced heavy surgical tubing center, durable nylon cuffs with plush fleece cover, and quality chrome-plated hardware. 21″ surgical tube center, 1 1/2″ wide x 18″ long cuff Use with caution and proper supervision. Horses can lose balance, fall, rear, or jump when reacting to hobble pressure, potentially causing injury to both horse and handler.