TonePros Sound Labs International is a guitar hardware manufacturer founded in 1998, specializing in precision bridge and tailpiece assemblies designed as drop-in upgrades for electric guitars. The company's core innovation is a patented locking system for Tune-o-matic style bridges and stopbar tailpieces, which secures the hardware to its mounting studs to improve sustain, tuning stability, and resonance transfer into the body of the instrument.

The product catalog spans vintage replacement bridges, Standard Tuneomatic and Nashville-post bridges, 7-string variants, wraparound tailpieces, locking studs, aluminum tailpieces such as the T1ZSA, and complete bridge-and-tailpiece sets like the popular LPM04. Finishes include chrome, nickel, gold, black, satin, antique silver, and bronze. Beyond bridges, TonePros also produces a line of Professional Upgrade Tuners. The hardware is used as original equipment by a number of guitar builders and is widely available through retailers including StewMac, Allparts, and WD Music.

TonePros hardware has been adopted by artists including Slash, Zakk Wylde, Warren Haynes, Michael Schenker, and Rick Nielsen, among others, across rock and metal contexts where tuning stability under heavy playing is a common concern.