●Perfect for USA Fender Strat Guitars, Works the same way if your guitar is using a Squier style and Imperial inch size 24 Spline Pot ●Fits most US 6mm (15/64") split shaft potentiometers like inch size, narrow 24 splines, CTS/Fender/DiMarzio/Bourns ●Inner Diameter: 0.2 inches (6 mm), Outer Diameter: 1.0 inches (25 mm), Height: 0.5 ●Nylon, numbers 1-10 ●Package includes: 3 pcs ST Knobs (2 Tone + 1 Volume)