The Park Tool HCW-4 is a double-ended wrench that fits two common fittings found on adjustable cup-and-cone bottom brackets (Sugino 75, Sugino Super Lap, Hatta R9400, etc.). 

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 replaceable pins to fit many adjusting cups with pin holes.

Heat-treated and nickel plated for a lifetime of use.