These are high quality Vintage Forge Rounded Dome Knobs compatible with Telecaster Guitar & Precision P-Bass and others. Fits 1/4" (6.35mm) solid shaft pots for U.S.and Mexico made Telecaster and Precision Bass models (1951-present). Will also fit any other brand/model with a 1/4" diameter pot shaft. Heavy duty CHROME Finish. Fits 1/4 in. (6.35mm) solid shaft pots for U.S.and Mexico made Telecaster and Precision Bass models (1951-present). Will also fit any other brand/model with a 1/4" diameter pot shaft. High quality metal (CHROME Finish) Dimensions: 19mm x 19mm Tightens with the included hex wrench Factory Sealed Packaging Part #RK60US-CHR