Thank you for viewing. This is a stud bolt & anchor set for a guitar tremolo unit. Would you like it as a replacement or repair part? The brand is unknown because there is no manufacturer's stamp. I purchased it over 20 years ago, so I believe it's a part related to a Japanese vintage guitar. [Product Contents] Stud bolts: 2 Anchors (embedded nuts): 2 Color: Black [Condition] These are used guitar parts. There are minor scratches and small marks from use, but there is no critical damage such as stripped threads or major rust. They are still in usable condition. *Please check the images for details. [Shipping] I will wrap it in cushioning material (bubble wrap) and take measures to prevent water damage, and carefully pack and ship it. Immediate purchase is OK. Thank you. --- #GuitarParts #ElectricGuitar #Tremolo #Bridge #Stud #Anchor #FloydRose #Repair #Restoration #Maintenance #BlackParts