This is the optional Robinson Racing 12 Tooth Pinion Gear for the

Kato 2-270 HO Scale 490mm (19 1/4") Radius 22

and rough landings

or you will void the warranty

HPI Racing 115538 Pro-Series Tools 2.0mm Hex Driver Measurements This is the optional RobinsonHPI Racing 115538 Pro Series Tools 2. 0mm Hex Driver HPI Racing Pro Series are made to exacting standards to fulfill the needs of all RC hobbyists, from bashers to pro level racers. These tools will perform and look great for years. Features: Large handle for ease of use with or without pit gloves Lightweight shaped composite handle with hanger hole Orange anodized aluminum accents Hardened steel tool tips Quick hex driver size identification Laser