Ergonomic Hand Pedals for the MagneTrainer Pedal Exerciser Ergonomic design places your hands in a more natural position Great for physical therapy and when using the MagneTrainer as an arm bike Smooth forward and in reverse rotation; Each handle contains two high-quality sealed bearings Works with our MagneTrainer and TotalBodyCycle. Has 9/16" threads. Sturdy construction; built to last; Comes with a full one year manufacturers warranty