The Precise Auto Sports Digital Quik Clutch System makes measuring your RC cars Centax clutch system a breeze! Measuring down to 0.01mm makes the Quik Clutch System the most accurate way to make those crucial adjustments. The Set includes both the Quik Spring Gauge & the Quik Gap Gauge.https://www.facebook.com/PreciseAutoSports/videos/220098319299299/