These potentiometers are widely used guitar tone and volume controls. Metric size potentiometers, mostly imported guitars or homemade guitars 6mm knurled split shaft, fits coarse knurled (18 spline) knobs.It will fit stock knobs for modern ///ESP etc guitars made in China/Korea/Japan Metric size, thread M8 x 0.8, thread height 10mm (3/8") Aluminum. 24mm (15/16") diameter full size.Standard rugged construction With audio tapers with standard +/-20% resistance tolerance, 500K ohm potentiometers are the standard control for humbuckers. A250K has a slightly higher pitch than 500K and bleeds (attenuates) some of the high frequencies to groundColor: GoldMaterial: MetalPackage Contents: 4 x A500K Potentiometers Only the above package contents are included, other products are not included.Note: The light and monitor difference may make the color of the item slightly different from the actual object. The measurement allowable error is +/- 1-3cm.