The Pedro's Chain Pig II Chain Cleaner uses pro-grade brushes and an absorbent sponge that removes grime, dirt, and oil from your chain, so you can ride with less gunk clogging your drivetrain. This little piggy snaps onto your chain with a quick-lock closure and features a rear derailleur hook to stabilize itself as you move the chain through the Chain Pig's brushes. Use it with an ounce of your favorite chain degreaser for the best results.