HRP Mip - Moore'S Ideal Products Rear X-Duty Spline Drive, Vaterra Twin Hammers This is MIP's Rear X-Duty Spline Drive for the Vaterra Twin Hammers.Features:Durable MIP USA Grade SteelDirect replacement from stock drives, no modifications necessaryCustom Involute Spline design for smooth telescoping operationIncludes MIP Thread Gel and Grease100% Quality made in the USAFor the Vaterra Twin Hammers