Grover 502C Roto-Grip Locking Rotomatic Tuners， 3-Per-Side， Chrome<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Insert the string through the post hole， wrap around once， then lock by tightening with the thumb screw. </span></li><li><span class="a-list-item"> Locking machine heads utilize the famous 18:1 Rotomatic design with a "thumb screw" mechanism. </span></li><li><span class="a-list-item"> Perfect replacement for the most standard machine heads. Chrome， 3 Per Side. </span></li><li><span class="a-list-item"> Includes all mounting hardware. </span></li><li><span class="a-list-item"> Insert the string through the post hole， wrap around once， then lock by tightening with the thumb screw. </span></li><li><span class="a-list-item"> Locking machine heads utilize the famous 18:1 Rotomatic design with a "thumb screw" mechanism. </span></li><li><span class="a-list-item"> Perfect replacement for the most standard machine heads. Chrome， 3 Per Side. </span></li></ul><!--   Loading EDP related metadata  --><div aria-live="polite" class="a-row a-expander-container a-expander-inline-container"><div aria-expanded="false" class="a-expander-content a-expander-extend-content" style="display: none;"><ul class="a-unordered-list a-vertical a-spacing-none"><li><span class="a-list-item">Includes all mounting hardware.</span></li><li><span class="a-list-item">Mounting screws and threaded hex peghead bushings with washers are included.10mm-diameter (13/32") pegholes required</span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/417VlU-eHPL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31YIwX5rkcL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41PdDfPDNPL.jpg" noproxy></div></div>