Dynamic Pocket cog

3D Printing | Recycled plastic | Compatible with 12mm through axles | Portable | Eco-friendly. Cleaning your drivetrain is a breeze with the Pocket Sprocket. Just slide it onto your 12mm through axle, place the chain in the groove, and clean or lubricate your chain, chainrings, and derailleur effortlessly. Application: Remove the rear wheel from your bike. Insert the through axle into the non-driven side of the frame and slide the Pocket Sprocket over it. Thread the chain through the groove of the Pocket Sprocket and tighten the through axle into the driven side of the frame, just like you would when installing your wheel. Now, you can easily clean your drivetrain or transport your bike safely.