The LR Baggs X-Bridge is a great sounding bridge even without the pickups, and its special piezo crystal employs 2 deflection modes to give you shimmering highs and rich lows. Its output level is comparable to that of a stock Strat and it will plug directly into most guitar amps with fine results. Its tremolo is provided with a Delrin arm bushing for silky smooth operation. Drops onto the posts of any American Standard Strat (with 2-1/16" spacing E to E). Comes with a one-year warranty.