【Wide Application】- This replacement bike chain holder dummy hub tool designed replacement for clean chain, easy to install and use, suitable for most bicycles, such as MTB and road bikes, mountain bike. 【Easy to Use】- Bike Chain Holder Tool is easy to use. Simply remove the rear wheel and insert the chain guard into the wheel dropout above the rear derailleur. You can use it perfectly with your chain cleaner or chain degreaser scrubber. Mini and lightweight, easy to carry and store. Useful equipment replacement for bicycle maintenance and transportation. 【Multifunction】- Bike Chain Holder replacement for Bike Chain Cleaning can keep the chain off the crank when the bike needs to be cleaned or transported. The roller follows the chain as it moves, which can prevent damage to the chain.