Rotomatic 102N Guitar Tuning Machine Heads Are A Marvel Of Engineering And Design Rotomatics Have A Gear Ratio Of 14:1, And A Housing That Provides Optimal Bearing For Worm, Gear And String Post Precision-Cut Worm And Gear Serve Up Perfect Meshing, Eliminating Backlash And Slippage A Countersunk Tension Screw Lets You Customize Tension To Your Personal Preference The Rotomatics Gear Box Is Permanently Lubricated, Giving You A Lifetime Of Trouble-Free Operation 58 Washers, Bushings And Wood Screws Are Included With This Set Of Six Grover Rotomatic 102N Guitar Tuning Machine Heads
               
                
   
                 
              
                
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