2.75" Omni Directional Wheel - Double Roller (2-pack) (276-1902)
Omni-Directional Wheel can travel in more than one direction. When the axle spins, it behaves like a normal wheel. However, you’ll notice that there are rollers all around the outer circumference. These rollers allow the wheel to travel sideways as well!
2.75" Omni-Directional Wheels are compatible with 0.125" square bar drive shafts.