Park Tool - HCW-11 Adjustable Cup Wrench
PARK TOOL - HCW-11 ADJUSTABLE CUP WRENCH
The HCW-11 fits "slotted" bottom bracket adjusting cups and cups with "raised" 16mm wrench flats. These are common on older English bicycles and less expensive bicycles. The opposite end has two ears that are 23mm wide and approximately 5mm wide.