The "JCL" tuners are 18:1 gear ratio tuners and come in sets of six (6).  Standard size "JCL" tuners can easily be swapped with "Larrivée" branded 16:1 tuners. All tuners come complete with grommets and screws in sets of six (6). 

*Standard size "JCL's" are also drop-in replacements for "Larrivée" standard-size tuners.