Cyclus Tools 7202783 Installation Tool for Bosch GEN4 Lockring Tool with Retaining Spring with 3/8 Inch Drive : Amazon.co.uk: Sports & Outdoors
LRT-1 Lockring Tool — Bosch® Gen 2 | Park Tool
IceToolz M801 Lockring Tool for Bosch Ebike & BBB PowerPull Crank Pulley Bottom Bracket Tool for All Standard Bike Spindles BTL-14 Puller, One Size : Amazon.co.uk: Sports & Outdoors