TP-6 Type Tailpiece Chrome, with Stud Anchors This is an offering for a TP-6 type tailpiece. While it's an aftermarket part, the machining and the fine tuner section made of brass are, in my opinion, better than the original. The outer diameter of the anchors is approximately 12mm. The inner diameter of the stud bolts is approximately 7.5mm. Please note that these are not inch sizes. Regarding installation, please do so at your own risk or consult a professional repair shop. How about using it to dress up an ES-335, Les Paul Custom, or similar guitar?