DEWALT’s cordless PEX expander is built for one job, and it shows. The DCE400D2 is a purpose-built tool that eliminates the hose and compressor of traditional systems. It’s a complete kit, with three heads for 1/2-inch, 3/4-inch, and 1-inch PEX-A tubing. The automatic rotating head is the key feature. It ensures a perfectly even expansion every time, which is critical for a reliable, leak-free seal.

In practice, the tool is fast and surprisingly manageable. The full-trigger actuation and bright LED light make working in tight, dim spaces like a crawlspace or under a sink far less frustrating. The two included 20V MAX batteries provide enough runtime for most residential jobs, and the belt hook keeps it accessible. The rubber overmold offers a solid grip, even when your hands are dirty.

The convenience comes at a premium, and the tool is undeniably specialized. For a pro plumber or a dedicated DIYer tackling a whole-house repipe, the time saved and consistency gained are worth the investment. For occasional small repairs, it’s likely overkill. But for its intended user, it transforms a messy, two-person job into a clean, one-person operation.