Vaterra Twin Hammers 1.9 Rock Racer RTR This is the Vaterra Twin Hammers 1.9 Rock Racer RTR.Youll never have to choose between a 1.9 crawler and an off-road buggy again. With the Twin Hammers rock racer, you get the best of both worlds in one bone-crushing vehicle.Easily handle anything you come up against, from extreme jumps to jagged rocks. Simply shift the two-speed transmission on the fly and you're good to go. Your next adventure is waiting, and it's