• Fit perfectly with any motor 8mm round output shaft
• Steel with zinked plated offers strong, solid and rigid coupling/hub
• Comes with three mounting holes tire with a standard M5 bolt, Philip cap
• Shaft and Coupling is locked using two M4 bolt, Philip cap (included)

With the Metal Key Hub - 8mm, you may combine it with robot wheel for a complete mobile robot driving tire. This coupling fit nicely to IG42 DC geared motor or any motor with an 8mm round output shaft. Besides mounting it with the wheel, the user may use it to connect to any bar or pulley and allow your DC motor to work with your system. Your imagination limits it.