Sperzel Guitar Machine Heads Lock

Sperzel tuning keys consist of advanced design standards. Every component is designed to provide stable performance and reliable action during combined movements. Our standards do not allow loose or floating components that are evident with older, traditional stock tuning keys. Eliminating age-old tuning problems and improving tuning capabilities was recognized on the back cover of the October 1979 issue of Guitar Player magazine, where it was described as “the first significant advance in guitar tuning capabilities.”

Our tuning keys are machined from solid billet aluminum for light weight and held to precise tolerances and quality checks to produce a precision tuning key. All of this combines to help eliminate shaft wobble and endplay and minimize backlash.

Our Trim-Lok model offers no tying or winding around string posts, greatly improving your tuning capabilities for playing style and enjoyment. Rid yourself of Tuning Torture Syndrome!

Aluminum also allows us to offer a wide range of anodized colors in solids or combinations. Anodizing is a very durable finish that does not affect the integrity or precision of the tuning key.

All guitar models are easily reversible, allowing conversion to left-handed or custom configurations. Sperzel has been manufacturing staggered string posts since the late 1970s, allowing for better pull through the nut and reducing the use of string trees on six-in-line guitars with flathead stocks. Guitars with tilt-back head stocks use all one post height; our years of experience will help you determine the height you need. This is important to know when ordering the correct set of keys for your guitar – staggered for flat; non-staggers for tilt-back.