Honda/Acura damper pulley tool gets update From Schley Products comes this updated Honda/Acura 4" Offset Damper Pulley Holding Tool No. 60100A with new 4" offset design that works with all older and new applications. The 50 mm hex holds the harmonic damper pulley for R'R of crank bolt. A 1/2" square drive for breaker bar or ratchet attachment point holds harmonic damper pulley, and the center hole is adequately sized to allow crank bolt R'R access.