Welcome to our store！</br> 1、Designed for protecting the runner's safety while using the treadmill. 2、Once the safety key break away from the induction area of running machine, the running machine will produce a warning tone to prevent the user from falling down and get injured. 3、Treadmill safety key: It can work easy and quick on most treadmills requiring a round treadmill safety key. 4、With a strong clip:It can easily clamp to any part of your clothing and it's strong to hold. 5、3 types of running safety key, easy to fit for different diameter treadmill switch. <div class="wang-edit-text"><span style="font-size:16px;"><span style="font-family:Arial;"><strong>Features</strong>: 1. Designed for protecting the runner's safety while using the treadmill.&nbsp; 2. Once the safety key break away from the induction area of running machine, the running machine will produce a warning tone to prevent the user from falling down and get injured.&nbsp; 3. Treadmill safety key: It can work easy and quick on most treadmills requiring a round treadmill safety key. 4. With a strong clip:It can easily clamp to any part of your clothing and it's strong to hold. 5. 3 types of running safety key, easy to fit for different diameter treadmill switch.&nbsp; <strong>Specification</strong>: Condition:100% Brand New Material: Plastic+nylon+magnet Color: As Pictures Shown Type: Large Size, Magnetic Medium Size, Magnetic Small Size(Optional） Normal type large size is suitable for diameter at the treadmill switch is greater than 32mm/1.3in. Magnetic medium size is suitable for diameter at the treadmill switch is greater than 28mm/1.1in. Magnetic small size is suitable for diameter at the treadmill switch is greater than 18mm/0.7in.&nbsp; Weight: Approx.24g<span style="white-space:pre;"> </span> <span style="white-space:pre;"> </span>&nbsp;&nbsp; <strong>Package list:&nbsp;</strong> 1 * Treadmill Safety Lock </span></span></div> Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>