1、Better Design: The multi subdivided circular structure of the 102mm metal omnidirectional wheel enables easy self stabilizing, which ensures smooth running with little vibration. 2、Dual Bearings: Each small driven wheel is embedded with miniature bearings, turning the sliding friction into rolling friction to achieve lateral movement with micro resistance. 3、Good Material: Using high quality silicone material, the drum shaped small wheel has strong grip, which can run silently on wood, ceramic tiles, carpets and many other surfaces. 4、Advanced Work: Treated with high temperature baking varnish, the omni wheel with aluminium alloy hub is very is beautiful, and also has excellent durability for long term use. 5、Easy to Install: Comes with a light weight and a compact size, the omnidirectional wheel can be easily installed on robot, toy car, etc. for more DIY entertainment.