Ideal Replacement: Don?t let a lost key stop you from using your treadmill - our standard-sized, square, non-magnetic treadmill key is an ideal fit for over 2,000 treadmill models. Comparable to OEM part numbers 119038 and 119039. This is Not designed for keys requiring a round and magnetic key. The square Treadmill Safety Key Measures 1 1/16? in width and 2 1/16? in length. Not a Universal Safety Key - Compatible with select models requiring a square, non-magnetic key: Compatible with many specific models from a variety of manufacturers that use a square, non-magnetic key, including select models by: Weslo Cadence, Proform / Pro-Form, Nordictrack, Lifestyler, Horizon, Healthrider, Reebok, Softstrider, Sportcraft, iFit and more. Does not work with models that require a round or magnetic key Made to Last: Made from rigid ABS plastic with a high-quality braided cord, our replacement treadmill safety key is designed to stand up to the constant use of even the most frequent runners / walkers. Easily clips to virtually all types of clothing. Note: Key is Not compatible with most models from Alliance, Crosswalk, Epic, Fitness Gear, Landice, Lifespan, Livestrong, Merit, Pathfinder, Smooth, Sole, Sunny, Tempo, Triumph and Xterra. This product is manufactured and distributed by Impresa Products. This is not a Weslo Cadence, Proform / Pro-Form, Nordictrack, Lifestyler, Horizon, Healthrider, Reebok, Softstrider, Sportcraft, Alliance, Crosswalk, Epic, Fitness Gear, Landice, Lifespan, Livestrong, Merit, Pathfinder, Smooth, Sole, Sunny, Tempo, Triumph or Xterra product and Impresa Products has no affiliation with or endorsement from these brands. Our product is not covered under any other manufacturer's warranty (except for Impresa Products). The aforementioned brand names and logos are the registered trademarks of their owners.