This is a round treadmill universal magnet replacement safety key.Used on the following Treadmills including NordicTrack, Proform, Image, Weslo, Reebok,Epic, Golds Gym, Freemotion, and Healthrider. Fits most models from Alliance, Pacemaster, Fitness Gear, Horizon, Bowflex, Landice, Lifespan, Livestrong, Merit, Pathfinder, Smooth, Sole, Sunny, Tempo, Triumph and Xterra. Specification: Product Name: Treadmill Safety Key Weight: 3.2 oz Material: ABS Clip Size: 1.6in * 1.1 in/4cm * 2.8cm Shell Diameter of magnet: 1.2 in/3cm Diameter of magnet: 0.35in/0.9cm Nylon Rope Length: 3 Feet/1M Package Includes: 1 x Treadmill Universal Magnet Safety Key Note 1.This universal treadmill safety key is suitable for almost 99% of treadmills. For size reasons, we can't guarantee that it is suitable for all treadmills. If there is any incompatibility, please contact us and we will give you timely service. Or please consult us before purchg. 2.The magnet ends are mounted on the magnets of the treadmill. Different treadmills may have different safety key installation positions.?Quality Assurance?: Customer satisfaction is our top priority, Goodtechnical provides customer service at any time. if there is any product issues, we offer free replacement. ?Wide Compatible?:This universal treadmill safety key is suitable for almost 99% of treadmills, compatible with most top brands, including  Alliance, Pacemaster, Fitness Gear, Horizon, Bowflex, Landice, Lifespan, Livestrong, Merit, Pathfinder, Smooth, Sole, Sunny, Tempo, Triumph and Xterra. For size reasons, we can't guarantee that it is suitable for all treadmills. If there is any incompatibility, please contact us by message or consult us before purchg. ?Solve Common Problems?:If your treadmill will not power up or has inconsistent power supply to the system, it is often due to a faulty safety key. Our replacement safety keys will solve these common problems with treadmills at a fraction of the cost. ?Premium Material?: Safety keys are extremely important to maintain the efficient operation of any treadmill. The round treadmill safety key are made of high quality ABS plastic, braided rope, Powerful magnets and springs, This enhances their strength and safety. ?Treadmill safety key?: magnetic work, can work easy and quick on most treadmills requiring a round treadmill safety key. It can easily clamp to any part of your clothing and it's strong to hold.Easily clips to virtually all types of clothing so you can forget about the key while you walk or run.Date First Available: January 8, 2020. Best Sellers Rank: #46,978 in Sports & Outdoors. Customer Reviews: 4.5 out of 5 stars 381 ratings 4.5 out of 5 stars. : B083M7F1XY. Size: ?Large. Style: ?Black. Manufacturer: ?GWY. Brand Name: ?GWY. Item Weight: ?3.2 Ounces. Item Dimensions LxWxH: ?1 x 1 x 0.3 inches. Package Weight: ?0.01 Kilograms. Item Package Dimensions L x W x H: ?5.35 x 2.95 x 0.63 inches.