Approved for use with Type ACR, L, K hard and soft copper tube;Industry-leading Two Ring Advanced Press (T.R.A.P.) Technology;DualSeal Ring Design provides superior sealing and joint strength with 200% more surface contact;TrapZone Leak Barrier innovative vacuum-zone further ensures leak protection;Force360 Press Contour provides more uniform joint compression and sealing performance;Tri-Lock Press Profile creates superior joint strength and pressure handling capabilities;Compatible with R410A and other commonly used refrigerant gases and oils;Propietary Streamline ACR Press Jaws available from Milwaukee Tool;Compatible with leading full-size press tools on the market;Includes a 10-year limited warranty against defects in material and workmanship