A shop version of Park Tool's world famous Chain Scrubber built for daily use. The CM-25 features a super-tough die-cast A380 aluminum body and handle, plus a unique brush/sponge replacement cartridge for easy cleaning and replacement. Our proven four-brush scrubbing design cleans chains thoroughly inside and out, and dual-sided sponges and wicking pads help to reduce drips. The brush and sponge cartridge quickly and easily clicks in and out for cleaning and replacement. 100% serviceable and rebuildable, the CM-25 is a shop-quality cleaner built to give years of constant use.