Skullytone FX is a small-batch boutique stompbox builder based in Surprise, Arizona. The operation focuses on hand-built fuzz and overdrive circuits, with most pedals sold direct through Reverb, eBay, and word of mouth rather than traditional retail.

The lineup centers on classic fuzz reissues and variants. The Russian Spy is the brand's best-known pedal, a Big Muff–style fuzz offered in Sovtek-era "Cold War" and Violet Ram's Head versions with switchable tone-stack options. The Hart Bender combines Fuzz Face and Tone Bender voicings into a single dual-circuit pedal.

Skullytone FX has 2 products cataloged on Equipboard, including Fuzz Effects Pedals and Distortion Effects Pedals.