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.)