I purchased this on Yahoo Auctions two years ago. It's a special item with a string spacing of 10mm. It's made of brass and cost 40,000 yen at the time. It seems to be made in the USA, and the hex wrench for the set screws is only 1/20 inch. There are rust spots in places. It gradually rusted while being stored at home. I polished it with Piccard, so it has a shine. I'm selling it for 9,000 yen, including the three mounting screws. Since it can't be installed on most guitars, please read the above description carefully before purchasing. Thank you.