Musiclily Pro Brass Full Metric Sized Control Pots A500K Push/Pull Audio Taper Potentiometers for Guitar (Set of 2) These pots are widely used guitar tone and volume controls, good to coil tapping, phase switching, kill switches etc.Metric sized pots mostly use in import guitar or Asia made guitar. 6mm knurled split brass 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 Metric sized, Thread M8 x 0.8, Thread height 10mm(3/8 ), aluminum. 13x17mm( 1/2 x 11/16 ) full sized base . Standard solid construction Audio taper with standard ±20percent 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 Package includes 2pcs potentiometers, nuts and washer