Sharkbite PEX Clamp pincer tool. New. Clamps 3/8 in., 1/2 in, 5/8, 3/4 in and 1 in PEX clamp rings. 3-handle design allows for one-handed gripping, Factory calibrated and comes with the go no go calibration gauge. Another item I bought and never used. My buddy came over and did the water line installs instead. So I can't vouch for how well the tool works since it is still sealed in the box.