BBLT5 (Bottom Bracket Lock Ring Tool) is for professional use to adjust NJS bottom brackets while installed on a bike. These bottom brackets have lockrings that are usually only about 3.5 mm thick, and their notches can easily be damaged if an inefficient tool slips.

BBLT5 has a special silver plate that assists in holding the lockring in place, by keeping the tool properly aligned with the bottom bracket and improving efficiency.

The three-layer handle is about 8mm thick, and each edge of the plate is rounded for a more comfortable grip. The straight handle profile allows direct torque application for more accurate work, and here is a hook hole on the side of the handle for storage on your toolboard.

Six protrusions designed to fit NJS bottom brackets (Dura Ace, Sugino, Hatta) and Campagnolo bottom bracket lockrings.