Park Tool LRT-3 Chainring lockring ToolThe Park Tool LRT-3 Chainring lockring Tool is constructed of 4140 heat treated steel and plated for long life and has been machined for a perfect fit for an efficient and durable tool that'll last for years to come. The 8 notches on this freehub tool remove and install the direct mount lockring that retains front chainrings found on some SpecializedA(R), CannondaleA(R) and FSAA(R) modular cranks. A 36mm hex drive should be used with Park Tool TWB-36 Crow Foot and a torque wrench to properly measure torqueFEATURESFits SpecializedA(R), CannondaleA(R) and FSAA(R)For lockrings with 47-48mm outside diameter and 4 or 8 notchesFits both 4 notch (FSAA(R) and CannondaleA(R)) and 8 notch (SpecializedA(R)) lockrings36mm hex drive to be used with Park Tool TWB-36 Crow Foot and a torque wrench to properly measure torqueConstruction 4140 heat treated steel and plated for long lifeManufacturer's Part # LRT-3 | Park Tool LRT-3 Chainring lockring Tool For: Specialized, Cannondale, FSA, 4 & 8 Notch