Park Tool HCW-5 Bottom Bracket Wrench 

• The universal single hook end will fit most notched lockrings with an outer diameter of 43 to 46 mm
• The three-hook end will fit 3-notch lockrings with a maximum outside diameter of 46 mm, and minor diameter (in the notches) of 40 mm
• Heat treated and nickel plated for lifetime of use
• Made in the USA