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.
"[1] The Badass came on the market in the 1970s,[2] 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).
[3] The first Badass bridges were built from diecast zinc and were considered somewhat rough;[4] later models were made from a high-density zinc alloy and more finely milled.
[5] Badass is currently owned and distributed by Allparts Music, a subsidiary of Morse Group.