
The Park Tool HCW-4 is a double-ended wrench that fits two common fittings found on adjustable cup-and-cone bottom brackets. One end is compatible with the raised 36 mm wrench flats commonly found on fixed cups, and the opposite end features a pin spanner with two pins to fit many adjusting cups with pin holes. Heat-treated and nickel plated for a lifetime of use.
Ski, climb, hike, camp, and summit with expert-curated, guide-tested outdoor gear from top brands. Shop online or visit us in Seattle for friendly advice!
Not valid on sale items, Garmin products, Arc'teryx or Totem Cams. Other exclusions may apply.
© 2026, Ascent Outdoors