One master cinch tool installs all sizes from 3/8″ to 1″ of Cinch Clamps. With a unique “tab” design, the Cinch Tool goes into those hard-to-reach spaces. Ratchet design releases only when the cinch clamp tab is properly pinched, thus ensuring a leak-proof connection. No guaging or tool calibration necessary. Meets ASTM F-2098 specifications.