Niceco Treadmill Safety Key, Universal Treadmill Magnet Security Lock, 28Mm Magnetic Shell, Replacement Kit For Sole, Weslo, Weider, Epic, Healthrider (Red)Package Includes: 1 x Safety Treadmill Key. Product Specification: Product Name: Treadmill Safety Key Material: ABS Clik Size: 2.3in * 1.1 in/5.8cm * 2.8cm Shell Diameter of magnet: 2.8cm Diamet..