1. Relefree® Universal Sports Running Machine Safety Safe Key Treadmill Magnetic Security Round Switch Lock Fitness Red Useful New (Click Link to Check Price on Amazon)
Editor's Rating : 9.7 out of 10
Treadmill safety key:It can work easy and quick on most treadmills requiring a round treadmill safety key.Strong Clip:It can easily clamp to any part of your clothing and it's strong to hold.

2. Treadmillpartszone 208603 Treadmill Key with Clip Round Magnet (Click Link to Check Price on Amazon)
Editor's Rating : 9.8 out of 10
This part will work on many of the ICON Health and Fitness models. Icon Health and Fitness distributes exercise equipment under the following brand names: Nordic TrackPro Form

3. Treadmill Safety Key - Fits Many Models - Replacement (Click Link to Check Price on Amazon)
Editor's Rating : 9.8 out of 10
PLEASE SEND US A MESSAGE IF YOU HAVE ANY COMPATIBILITY QUESTIONS BEFORE PURCHASING THE KEY. Standard size treadmill key for over 2,000 treadmill models utilizing non-magnetic treadmill keysIs your treadmill key lost, missing or broken? The Treadmill Safety Key by Impresa provides a perfect replacement for less than half the cost from the manufacturer and is made from durable, high-grade plastic (Model # 119039)

4. Universal magnet safety key for All NordicTrack, Proform, Image, Weslo, Reebok, Epic, Golds Gym, Freemotion, and Healthrider Treadmills (Click Link to Check Price on Amazon)
Editor's Rating : 9.4 out of 10
Standard size treadmill key for over 2,000 treadmill models utilizing magnetic treadmill keysIs your treadmill key lost, missing or broken? The Treadmill Safety Key provides a perfect replacement for less than half the cost from the manufacturer and is made from durable, high-grade plastic

5. 1" Safety Key for Proform & Weslo Treadmills (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10
30 Days Warranty