Hand built in the US by my friend Greg Heumann. I liked the quality of these so much that I became a distributor... win/win, saves me the bench time of producing something similar.
I've tried all the others, none in my opinion (aside from the discontinued Switchcraft 329) are nearly as well engineered as these. Full one year warranty from the manufacturer.
Ships via uninsured USPS First Class at your risk (never any issues in over a decade). Please contact before buying if you desire insured shipping at additional expense.