I ordered a 3/8" model and actually needed a 1/4 connection. My error there however the handle does not have the QD on it and I ended up (for expediency) buying another replacement handle off amazon with the adapters I needed and cost me another $90 and change. The unit it solid and looks good, and I expect all to work once I get the new handle in. The handle that came with it came with a 3/8" male QD on the back of the handle, and it is a custom adapter, so if that is what you want, you should be good. As others have noted, if you break the handle, better plan on just buying an around $60 replacement to get the standard adapters on each end that you will need. Not that big a deal, but was a bit of a pain as I could not find an adapter that fit the OEM handle. There are others on Amazon that will work fine, so not end of the world. Unit seems solid...