The versatile SharkBite 3-handle full-size clamp tool clamps 3/8-in, 1/2-in, 5/8-in, 3/4-in and 1-in stainless-steel PEX clamp rings onto PEX tubing (clamp rings not included). The 3-handle design allows for one-handed gripping keeping the other hand free to hold a flashlight, ladder or pipe. The SharkBite PEX clamp tool compresses the stainless steel clamp ring to barb fittings creating a watertight seal. The clamp tool will not release from the clamp ring unless you make a properly secure connection. The tool is factory calibrated and all clamp connections conform to the ASTM F-2098 standard.