Unfortunately, this is no longer available, but perhaps the Related offers may be of interest.
huendeskes Barely used, like-new, American-designed Kahler tremolo with bearings - Kerry King from Slayer uses one like this, for example.
The tremolo arm is very easy to operate (smooth) compared to other designs (Ibanez ZR, Floyds), and the bridge can be locked with an Allen screw. Relatively easy to install (4-bolt mounting from above).