Badass was first trademarked by Leo Quan, a manufacturer of bridges for guitars and basses. Badass bridges (used on the Martin EB18 electric bass and a replacement bridge on the Fender Precision Bass) feature individually adjustable saddles, which allows for "extremely accurate intonation adjustments." The Badass came on the market in the 1970s, and was made by entrepreneur and guitar repairman Glen Quan, of Marin County music store Bananas At Large and Leo Malliaris of Oakland's Leo's Music (hence Leo Quan). The first Badass bridges were built from diecast zinc and were considered somewhat rough; later models were made from a high-density zinc alloy and more finely milled. Badass is currently owned and distributed by Allparts Music, a subsidiary of Morse Group. In late 2022 and early 2023 Allparts Music relaunched the entire Badass bridge line including the Badass II bass bridge, Badass III bass bridge, Badass V bass bridge, Badass Wraparound Guitar Bridge, and Badass Fine Tuner Guitar Tailpiece.

Notable users and models