Full set of premium-quality, 48pitch aluminum pinion gears for use on RC cars. Full range of 12-29T pinions, includes the exclusive #107150 HUDY Graphite Pinion Caddy. High-performance pinion gears manufactured from special lightweight aircraft duraluminum to have lowest weight. Pinions are manufactured on a specially-modified precision gear machine which has ultra-precise tolerances and assures unparalleled concentricity. After machining, pinion edges are chamfered and then run-in. Pinions are given an even hardcoating so they stay absolute true for a long time.