EMSea 2Pcs Bike Chain Keeper Holder with Sponge Rings Replacement for 1/8 inch Derailleurs 12mm Thru Axle Bicycle Keep Tool Cleaning Transporting Lubing

Bike chain keeper holder made of plastic material, high strength, lightweight and durable. Bicycle chain keep tool used to keep the chain tension, away from the frame and from tangled.H-shaped chain groove structure, avoid chain skipping when changing speed. Bike chain keeper holder fit for all 1/8 inch derailleurs and chains and 12mm thru axle. The bike chain keeper can collocation oiled with sponge ring,and can assist in cleaning the chain. Easy to install and convenient to use,just simply remove the rear wheel and fit the chain keeper in the wheel dropout.