Most debit cards are run through a Credit agency in conjunction with your bank. Check your card, if it says Visa, Master Card or any other credit card company on it then I'd guess it'll work, I'll let either Ultra or Deep contradict me on that.
As for durability the Dominix V2 is quite durable. I have one myself (I own 7 US products). I can attest that all of their products, blades and hilts alike, can withstand quite a beating.
Cheers,
M.A.V.
I second this advice. Check with them if you like, you could email
[email protected] to ask about that sort of thing. The Dominix is a great hilt, very reasonably priced and extremely durable - most if not all Ultrasabers products are machined from aircraft aluminum, and the blades are polycarbonate and very durable as well. These things are made to take punishment, you don't need to worry about that.
Good luck with your purchase!