The Milwaukee M12 FUEL ProPEX Expander delivers the fastest 3/8 in. - 1 in. connections. Utilizing an auto-rotating head mechanism, the M12 FUEL ProPEX Expander provides even expansions for the most consistent installations. The new ProPEX Expander Heads with RAPID SEAL provide the fastest PEX seal for less down time before pressure testing. Access tight locations to install tubing with the compact, right angle design for fast and easy installations. All-metal gears and an integrated metal frame deliver maximum tool durability on the job site.