Hipshot Tremsetter Tremolo Stabilizer
The Hipshot Tremsetter greatly improves your guitar's performance by automatically returning your full floating tremolo to an exact "zero" neutral position, eliminating flutter and sag, so your guitar always remains in tune. You can bend strings, play bridge harmonics, aggressive rhythm parts or mute strings and the bridge will still remain stable. Best of all, because the device is total retro-fit, there is only a small amount of drilling required and absolutely no Yo chopping up of your vintage axe. It is simple - just install it and play!
Here's a video from Hipshot showing exactly how the device is installed:
You can view the rest of the Hipshot range HERE