Fast Trackers were rated first in speed and cornering when tested against all popular national slot car brands. Max-Traxx(TM) 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.