Product Description Guidelines for Replacing E-bike Components:Before you replace components on your e-bike, please read through the guidelines for component replacement for CE-marked e-bikes/pedelecs with pedal assistance. Specifications:Function:installation and removal of chainringsTool Type:pullerDrive Size:Square 3/8"Compatibility:Bosch Gen2 Performance LineBosch Gen2 Performance Line CXBosch Active Line (chainrings with less than 20 teeth)lockrings with 50 mm outer diameter and 8 notchesTechnical Information:Material:steel (4041)Features:loosens and mounts the locking ring that fastens the front chainring of the Bosch Gen2 e-bike motors behind the crank armreplacement for Bosch 0275009003 toolbit for torque wrenches with 3/8" socketmade from heat-treated steelcoated for long durabilityManufacturer Number:LRT-1 Contents:1 x Manufacturer: Park Tool Company 1185 Eagle Lake Rd Shoreview MN 55126 USA info@parktool.com Distributor: GROFA Action Sports GmbH Otto-Hahn-Straße 17 65520 Bad Camberg Germany info@grofa.com