Fits Bosch Active Line (chainrings less than 20 teeth), Performance Line and Performance Line CX modelsFor lockrings with 50mm outside diameter with 8 notchesReplacement for Bosch 0275009003 toolTorque wrench compatible 3/8` square driveConstructed of 4140 heat treated steel and plated for long lifeLockring ToolBlackLRT-1Bosch3/8`UPC/EAN/GTIN: 763477006875