• Exclusive patented design allows quick change-over from internal or external ring applications. • Simply push button on knob and rotate pivot. • Handles internal and external rings from 1/4 to 2. • Features three popular tip diameters (0.038, 0.047, 0.070) in 18Deg or 90Deg angled tips. • Kits include custom molded impact resistant storage case • Cushioned grip handles for comfort • Made in the USA