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A clean bike is a happy bike! The Park Tool BCB-4.2 is a four-piece brush set designed specifically to clean bicycles. Ergonomically designed and featuring dual-density, sure-grip handles, the BCB-4.2 includes a soft-bristle soaping brush for general cleaning, a sponge/bristle combination brush for heavy duty scrubbing, a tapered bottle brush for detailed cleaning of tight areas, and the GSC-1 Gearclean™ brush, with tough nylon bristles and a curved toothed pick to clean grit and grime from gears and small components.