Fast Trackers were rated first in speed and cornering when tested against all popular national slot car brands. Maxx Traxx technology offers maximum traction, handling and speed. Cars feature improved tire profile for gripping track, traction magnets for cornering speed, micro-balanced axle for a smooth ride, center magnets for all-over control, custom armature for horsepower and precision windings for acceleration. Use with any Life-Like Road Racing set, sold separately.