The Studica Robotics D-Shaft Collar is 6mm ID and 12mm OD. The inside diameter will fit any of the D-Shaft axles.
Material: 6061-T6 Aluminum
2*M3 thread for M3 SHCS
on the clamp side
Φ6.0mm D hole
May be used with 6mm D-Shape Shaft to secure wheels in their position.