JENZ Precision Machine Heads may look simple in design: But we nailed everything we set out to accomplish.

* Retro fit existing basses*
* Keep the standard look*
* No wrench’s or adjustable parts*
* Stabilize the headstock*
* Remove the need for a string tree*
* Remove string over string wrap*
* Secure the string to the post*
* Improve tuning stability*
* Reduce the tension from the headstock*
* Improve the low strings from flopping*
* Decrease the tension on the truss rod*
* Improve dead spot issues*
* Allow the string to be set to any location on the Post*
* Light weight or standard weight for balance*
* Improve the overall response of the bass*
* To make the best machine heads for an affordable price*
Weight got your Head(Stock) down? All JENZ machine heads are available in standard and light weight versions.  JENZ Machines are available with either a Brass Post (3.5 OZ.) or an Aluminum Post (2.4 OZ.). No need to re-drill and ruin your basses value to get light weight machine heads.

400 series tuners are available in either Bass side or Treble side. They are direct replacement for many Squire series and other basses produced in China and Korea.  

400 series tuners are available in either a Brass Post (3.5 OZ) or Aluminum Post (2.5 OZ) 

500 series tuners are available in either Bass side or Treble side. They are direct replacement for many American Standard, Mexican and Korean basses. 

500 series tuners are available in either a Brass Post (3.5 OZ) or Aluminum Post (2.5 OZ)