Create multi-drive robots with expanded torque and speed options.

Gear kit includes 2 additional 84-tooth gears not available in the Starter Kit #276-2151

4 x 12-tooth gears (40 in.-lbs torque limit)
4 x 36-tooth gears (120 in.-lbs torque limit)
4 x 60-tooth gears (200 in.-lbs torque limit)
2 x 84-tooth gears (260 in.-lbs torque limit)