Park Tool GSC-1
The Park Tool GSC-1 GearClean brush is a drivetrain cleaning brush with stiff bristles on one end and a serrated pick on the other for digging debris out from between cogs, updated to fit the tighter spacing of 11-speed cassettes. It is an inexpensive staple for anyone who cleans their own cassette, chainrings and derailleur pulleys.
Pairs well with
Park Tool GSC-1
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