Pitsco Education 36466 Tetrix MAX Omni Wheel, 4" (Pack of 2) Go to amazon.com Related posts Top 6 best pitsco education 52734: Which is the best one in 2022? FeatureAbility to drive forwardAbility to drive laterally10 Rollers DescriptionWith the use of 10 rollers, these wheels have the ability to drive forward and laterally. Available 4" sizes.