Product Description Specifications:Function:installation & removal of bottom bracketsTool Type:Special tool, socketType:multi-toothDrive:Square 3/8"Compatibility:Shimano Ultegra BBR60, XT MT800Size:16 notches; outer diameter 41 - 42 mm, inner diameter 39 mmTechnical Information:Material:aluminiumFeatures:bottom bracket tool for bearing cups with 16 notches and 41 mm outer diameter, e.g. Shimano Ultegra BBR60, XT MT800CNC precision-machinedanodised and laser engraved for easy identificationcompatible with ParkTool BBT-RS tool holding systemManufacturer Number:BBT-59.3 Contents:1 x Order Together:Optional accessories: BBT-RS Bottom Bracket Tool Retention System 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