Bigsby-style tremolo arm. (Not genuine) This is a new, Chinese-made product, so please understand that. I have inspected it without opening the bag, so returns due to scratches on the plating, etc., are not accepted. Please purchase only if you agree to this. I think it can be installed on guitars other than Bigsby. It is used by many people on various bizarre guitars, etc. All parts are new. Please ask any questions you may have, and I will answer them as best I can, but I am a novice, so I don't know about technical matters. Please consider the various sizes as a reference only. (Please purchase only if you understand the Chinese quality) I cannot offer a discount.