Input Metal Jack Plate for Gibson Epiphone Les Paul LP type guitars - Nickel by Gotoh, with 4 screws.  External size #34,3mm square (1-11/32 square) Mounting holes distance between the centers (center to center) is #25,4 mm (1); the jack plates have a slight curve to conform to the rounded sides of a Gibson® Les Paul®. The hole for the jack is 3/8 diameter.