Alpha Pots are widely used guitar tone and volume controls, good to fit small cavity. Metric sized pots mostly use in import guitar or Asia made guitar | 6mm knurled split shaft fits a coarse-knurled (18-spline) knob. It will fit modern Squier/Epiphone/ibanez/ESP etc made in China/Korea/Japan guitar's stock knobs | Genuine Alpha parts, made in Korea. Metric sized, Thread M8 x 0.8, Threaded portion height 10mm (3/8"), aluminum. 24mm (15/16") diameter full sized base. Standard solid construction | Audio taper with standard ±20% resistance tolerance. Full size, 500K-ohm pots are standard controls for humbuckers. A250K gives a slightly warmer tone than a 500K, and bleeds off (attenuates) some of the high frequencies to ground | Package included: 4 pieces potentiometers, nuts and washers