Compatible with Switchcraft 1/4 inch input jack. Fits onto the standard 7/8 inch diameter hole. Includes two mounting screws. Allparts Electrosocket™: a must-have accessory for your Telecaster®. The curved surface makes it easy to insert a jack and the diagonally-mounted screws provide resistance to loosening. Electrosocket™ from Allparts: patented and backed by the Allparts name and service.