Park Tool TS-4EB Hub-Drive Axle Adapter Description: The Park Tool TS-4EB Hub-Drive Axle Adapter quickly attaches to Park Tool TS-4, TS-4.2, or TS-4.3 wheel truing stands in seconds, and features purpose-built slots intended to secure flat-sided axles found on many hub drive e-bike wheels. Features: Adapter set with specially sized slots to secure the flat-sided axles found on many hub drive e-bike wheels Quick-release attachment deploys or stores in moments, readying for action when duty calls Intended for use with Park Tool TS-4, TS-4.2, or TS-4.3 truing stands Specifications: Color: Blue