ITEM NAME:Bike Chain Keeper Holder Dummy Sleeping Hub Tool For 12mm Thru Axle Description: Premium nylon bicycle chain keeper sleeping hub - high strength, lightweight and durable Unique storage buckle design can store your spare chains and insert small magnet stores small screws Also can be used as a small ruler Used to keep the chain tension, away from the frame and from tangled Easy to install and convenient to use -just simply remove the rear wheel and fit the chain keeper in the wheel dropout Specification: Material: Plastic Color: Black Works for 12mm thru-axle dropouts Package Includes: 1 Piece Bicycle Chain Holder Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks! SKU: DMO0012295154043282.Premium nylon bicycle chain keeper sleeping hub - high strength, lightweight and durable. Easy to install and convenient to use -just simply remove the rear wheel and fit the chain keeper in the wheel dropout.