The Lug Nut Thread Checker is an accurate and easy-to-use thread identifier for both lug nuts and wheel studs. Conveniently assembled onto a wire loop, it’s the perfect portable solution! SWTC-LN8 Size Specifications: M14 x 2.00 – Gold Thread Gauge M12 x 1.75 – Red Thread Gauge M12 x 1.25 – Yellow Thread Gauge 7/16-20 – Purple Thread Gauge M14 x 1.50 – Silver Thread Gauge M12 x 1.5 – Blue Thread Gauge 9/16-18 – Green Thread Gauge 1/2-20 – Black Thread Gauge Made in USA!