DEWALT PEX Expander heads are available in 1", 1/2", 3/8", 3/4" and 5/8". They feature automatic rotating capability for even expansion. Maximize durability and corrosion resistance with chrome coating and black zinc plating. They are backward compatible with Milwaukee ProPEX® Heads and color coded for easy size identification. (Milwaukee® is a registered trademark of Milwaukee Electric Tool Corp.ProPEX® is a registered trademark of Uponor Oyj.)