The New BricksBiggsFix BBF5000 is a Vibrato based on the B500 Import frame, but includes all the Brick's upgrades in one unit. The unique feature on this vibrato is the adjustable height BricksBiggsFix (Patented) Tuning Stabilizer. The height adjustment is made possible buy the new "cam" bushings which upon selected height are secured by tightening set screws. The other upgrades included on this unit: String Through "Top Loader" Shaft (rotating inside needle bearings), 360 degree rotating handle and of course, the beloved Super Squishy Spring!