YMC Oval-Indented-Guitar-Jack-Plate30-BK Oval Indented Guitar Jack Plate & Socket Black High Quality, 1 Pack Made of metal material with Black finish; Shape: Oval. Ideal for electric guitar building , Replace your worn out parts. Mounting hole center to center is 37MM, 3.5MM mounting hole diameter. Come with 1/4 inch 6.35mm Jack and screws, ready to use. Package Includes: 1 pc Oval Jack socket ,2pcs screws