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: Features a secure clip that easily attaches to clothing and stays firmly in place, compatible with various types of attire for convenient use. Durable ABS Construction: Made from sturdy ABS material, designed to resist damage and support long-term use. Automatic Safety Device: Functions as an automatic protection mechanism. When removed from the treadmill's sensing area, the treadmill immediately stops and emits a warning sound. User-Friendly Design: Provides added safety and peace of mind during exercise, making it a reliable and essential accessory for treadmill users.