Musiclily Oval Indented Jack Output Plate Jackplate and Socket for Mono Electric Guitar, Black(Pack of 10) Ideal for electric guitar building ,Replace your worn out parts Mounting hole center to center is 37MM, 3.5MM mounting hole diameter. Color: Black; Shape: Oval; Come with 1/4 inch 6.35mm Jack and screws Package includes: 10 pcs Jack Output Plate