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 & removal of chainringsTool Type:pullerDrive Size:36 mm open-end wrenchCompatibility:chainring lockrings with 54 mm outer diameter and 16 notchesShimano chainring lockrings for Shimano STEPS E6100, E7000, E8000, E9000Technical Information:Material:steel (4140)Features:installation and removal of Shimano chainring lock rings for Shimano STEPS E6100, E7000, E8000 and E9000made from heat-treated steelcoated for long durabilityManufacturer Number:LRT-2 Contents:1 x ParkTool Shimano STEPS lockring tool 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