S.M.A.R.TSliding Motion Advanced Rail Track slide rails system.Perfectly smooth sliding motionSelf-centering rudder axis: The perfect balance between smoothness and resistance for re-centering, for more accurate maneuvers. Long range of travel on rudder axis for precise maneuvers.Two differential brake pedals for optimized flyingLarge differential brake pedals: 10 inches/25 centimeters (12/45 shoe size). Rounded central pivot with central grip, on the differential brake's axis. Pivot angle with a 15° range of travel: on an incline for deliberate activation, avoiding inadvertent activation when using the rudder.Sturdiness and precisionVersatile ergonomic design suitable for all types of flight (aerial combat, space adventure, civil flight, etc.). With the heel-rest removed, you can control the rudder using the ball of your foot, with your heel on the floor. With the heel-rest in place, you can rest 100% of your foot on the pedal.