Does what it says

Easy install. Works well, but needs to be operated with tedious care, as it is possible to displace the unit slightly. And that will put your instrument out of tune.

Always press down on the unit before sliding it in or out. Majeu sure the unit is perfectly in place. Then check the fine tuning. You'll find the unit is NOT in place correctly if the tuning is off noticably. If the unit is its place, only minimal fine tuning is needed.

For floating trems, use a Super-Vee MagLok to stabilize the bridge first. That works.