International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Fits and removes chain ring lock rings of Bosch active line plus, Bosch active line 3rd generation and Brose e-bike systems. For 1/2" Socket wrench and 24 mm open-end wrench For 1/2 inch connector or 24 mm key For 1/2 inch plug connection or 24 mm key For Bosch Active Line Plus, Bosch Active Line 3. Generation and Brose For Bosch Active Line Plus, Bosch Active Line 3 Generation and Brose