The RIDGID 22668 1 in. Standard Jaw for PureFlow Systems (PEX) is designed to mechanically press PureFlow fittings onto 1" tubing. The jaw is compatible with RIDGID Standard Series Press Tools, including the RP 340, RP 330, 320-E, and CT 400. The jaw has been designed in conjunction with the Viega PureFlow system and PEX Press fittings, ensuring total system compatibility.