These pots are widely used guitar tone and volume controls. Metric sized pots mostly use in import guitar or made guitar 6mm knurled split brass shaft fits a coarse-knurled (18-spline) knob. It will fit modern ///ESP etc /Korea/Japan guitar's knobs Metric sized, Thread M8 x 0.8, Thread height 10mm (3/8 inch) aluminum. 24mm (15/16 inch) diameter full sized base . Standard solid construction Audio taper with standard +/-20% resistance tolerance, 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 colour:Gold Material:metal Package Contents: 4 x A500K Potentiometers Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.