Gotoh Aluminium Tailpiece with mounting studs.
The Gotoh® 510 Stop Tailpiece pivots on unique ball-end threaded locking studs, for straight string pull. Spring retainer clips prevent the tailpiece from falling off when the strings are removed, to save your guitar's finish from accidental dings. Made of lightweight aluminum for distinctive tone.
Post to Post spacing = 3 1/4 in. (83mm)
Insert Dimensions = 7/16 in. Diameter (11.3mm) X 1 in. Length (25.4mm)