2PCS Treadmill Safety Key Emergency Stop Switch Exercise Running Machine Security Lock Key for Most Treadmills Universal Compatibility: This safety key is compatible with most treadmills that require a round shaped key, including models from ICON, JOHNSON, Yijian, JUNXIA, Decathlon, and AD. Secure Clip: The key features a secure clip that easily attaches to any clothing and remains firmly in place, compatible with all types of attire for convenient use. Durable ABS Construction: Made from sturdy ABS material, this treadmill security key is resistant to damage and designed for long-term use. Automatic Safety Device: Functions as an automatic protection mechanism. When the safety switch moves out of the treadmill's sensing area, the machine immediately stops and emits a warning sound. User Friendly: Designed for ease of use, providing added safety and peace of mind during exercise sessions. The combination of convenience and automatic safety features makes it an essential treadmill accessory.