This is a product imported from overseas. It's a well-made aftermarket Lyre Maestro Vibrola replica unit, suitable for SG/Firebird/ES guitars, etc. Similar products are sold by MONTREUX and SCUD, but this one features "a harp design and a super realistic Gibson logo." I think the logo does a pretty good job of replicating the jagged lettering of the original Gibson logo. I installed it on my '61/'62 SG replica, and I was thrilled with the transformation, achieving the look I'd always wanted. It has a considerable weight, so it might help with neck dive. Regarding the change in sound, some say it reduces sustain, but that wasn't the case. Instead, it seemed to add reverb due to the spring, and I felt the resonance and sound improved, including the acoustic sound. The included items are shown in the images. All the mounting screws are included, so you can install it without needing to buy anything extra. I purchased it in chrome. Please search online for installation and adjustment instructions. They are easy to find. I do not provide installation support.