The RIDGID 19813 5/8 in. Compact Jaw for PureFlow Systems (PEX) is designed to mechanically press PureFlow fittings onto 5/8" tubing. The jaw is compatible with all current and previous RIDGID compact press tools (RP 240, RP 241, RP 200, RP 210, RP 100). It is 40% lighter and 33% smaller than Standard Series jaws, enabling it to easily fit into tight spaces. The jaw has been designed in conjunction with the Viega PureFlow system and PEX Press fittings, ensuring total system compatibility.