Park Tool CM-25 Professional Chain Scrubber

Shop mechanics and detail-minded home wrenches reach for the Park Tool CM-25 Professional Chain Scrubber, a rebuildable chain cleaning tool for keeping drivetrains running clean. A four-stage system of three brushes, two sponges, and two felt wipers scrubs all four sides of the chain in one pass.

The die-cast aluminum casing and handle ride on stainless steel hinge pins for shop-grade durability, and the unit is fully rebuildable with replaceable brushes and sponges. It handles 5- through 12-speed and some single-speed chains. Made in the USA, the CM-25 weighs about 500g.