For fast, efficient ProPEX expansion connections with Uponor crosslinked polyethylene (PEX-a) pipe, look to the Milwaukee M12 and M18 ProPEX expansion tools. They feature an auto-rotating head for accurate, one-handed expansion, and the quick-cam mechanism allows single-pull, continuous action. They can install ProPEX connections up to four times faster than standard expansion hand tools, and the batteries are interchangeable with Milwaukee’s complete line of M12 and M18 tools. The M12 accommodates 3/8" to 1" heads, and the M18 accommodates 3/8" to 11/2 heads.