The Park Tool HCW-17 removes and installs externally-notched lockrings, which are found on fixed-gear rear cogs, single speed cassette hubs, adjustable cup-and-cone bottom brackets, and some mid-drive e-bike motor lockrings including Batang BBSH & BBS02. The HCW-17 features two hooks with different radii for a precise fit on a wide range of lockrings. Constructed from spring steel and nickel plated for a lifetime of use.

• Fixed-gear lockrings with an outside diameter of 41 to 44 mm
• Single speed cassette hubs with externally-notched lockrings
• Adjustable cup-and-cone bottom brackets
• Four-notch Bafang BBSH, BBS02 mid-drive motor lockrings
• Length: 295 mm (11.6")