The adapter automatically rotates the expander head on each expansion to avoid creating grooves on the PEX tubing. This alleviates the need for installers to manually turn the tubing. Fitting easily into tight installation spaces, the lightweight ProPEX Auto Rotation Adapter expands 3/8", 1/2", 5/8", 3/4" and 1" tubing, fits on all ProPEX Expander Tools (manual, air and battery, except for the ProPEX 200 Battery Expander Tool) and is compatible with all standard expander heads. (Note: H-heads are not compatible with the adapter.) Features and Benefits: Fits easily into small installation spaces, Lightweight, Simplifies installation, Can help reduce sealing time in cooler weather, Consistent connection, and Fits on all ProPEX Expander Tools.