Wilkinson 162-NL-4S2M machine heads EZ Lok Staggered 6L nickel\nFinished with staggered string posts, this smart set of six-in-line Wilkinson 162-NL-4S2M machine heads ensure accurate and smooth string-to-nut alignment so no string trees are needed. These tuners also feature Wilkinson's EZ Lock system which firmly grips the string in place and reduces winding. Easily installed and backed up by Wilkinson-grade quality, these machine heads immediately upgrade the tuning stability of ST-style guitars.