8x1.25mm Outrunner Adapter Shaft - Tru-Turn Precision Model Products
Step-Down Shaft Adapters with Keyways On Stafford Manufacturing Corp.
TETRIX® MAX Motor/Axle Shaft Coupler (W39276)
Adapters – Max-Air Technology
Amazon.com : SmallRig D Shaft D-Ring 1/4 Inch Male Mounting Screw Adapter for DSLR Camera Rig Quick Release Plate - 838 : Electronics
AUS D Shaft to 0.5 in. Hex Adapter - AndyMark, Inc
3 Pack 1/4 Quick Release Adapter Screw Pin Enhanced Long 21mm Flat Head D Shaft D Ring 1/4" Inch Mounting Screw Adapter For Dslr - Auxiliary Devices - AliExpress
Cobra Bio Cell Driver Shaft Adapter
Knob Shaft-Adapter, 1,02 €
Pololu - Motor Shaft Adapters
SMALLRIG D Shaft D-Ring Thumb Screw Adapter 1/4''-20 Thead for Camera Tripod