Hi all, not sure if thisis the right spot but....

I'm looking at gifting myself a Regal Vise with my ( meager) tax return and would like to stay with the C-Clamp base style. My tying bench is about 2.25" thick so need to assure the Regal's C-Clamp has enoug bite to fit the bench. I've looked all over the net and can't seem to find the spec for it's max fit. Can anybody shed some light on this spec?
Thanks in advance for any help!