Please note that on some installs this socket is not deep enough to reach the threads fully. In that case I'd suggest getting the Lekkie tool or the cheap but effective double spanner wrench.
https://www.johnnynerdout.com/product-page/lekkie-bafang-outer-locknut-install-tool
https://www.johnnynerdout.com/product-page/bafang-install-tool
 
A precision CNC-machined aluminum tool for the installation and removal of select components with 16-notch tool fittings, including bottom brackets, center lock disc brakes, and e-bike motor lockrings. Manufactured in-house by Park Tool, anodized for easy identification and featuring a ratchet/torque wrench-compatible 3/8" drive.
The BBT-69.4 features integrated threads for full compatibility with the Park Tool BBT-RS Bottom Bracket Tool Retaining System (sold separately). The BBT-RS uses an adjustable spring-based tension system to apply consistent, adjustable pressure to the tool, ensuring full engagement with the tool fitting and preventing slippage.