The Studica Robotics 6 mm Low Profile Hex-Shaft Clamping Hub V2 is engineered to deliver a secure and compact coupling between your motor or drive shaft and wheels, sprockets, or other mechanical components. With its 6 mm hex-shaft ID and low profile form, it's ideal for tight-space and high-precision builds. Made of aluminum, the Studica Robotics Clamping 6mm Hex-Shaft Hub-V2 is used with flex and drive wheels