Park Tool BO-4 Corkscrew Bottle Opener fe-sport with shoulder knobs that bite

with shoulder knobs that bite in corners

is now available for Rival

It will not work on a road fork with narrow clearance or for fat bikes

or derailleurs

The chainrings are slightly thicker than the usual chainrings which leads to stiffness but requires slightly longer chainring bolts

Park Tool BO-4 Corkscrew Bottle Opener fe-sport with shoulder knobs that biteThe BO 4 is a combination corkscrew and bottle opener complete with knife foil cutter. Made in the tradition of our premium quality fold up tools, it folds for storage and features all stainless steel mechanisms housed in a forged aluminum case. This is a top quality beverage tool perfect for the workbench, toolbox or wine bar. Features Corkscrew, bottle opener, and foil knife Stainless steel mechanisms Forged aluminum case Mfr Claimed Weight TBC