Looks like standard cheap stuff from China. I have a small 2" angle vise that came with Tool cutter and grinder.
https://www.busybeetools.com/products/vise-3-way-tilting-super-precision-2in.html#tab-related
It is a specialty item - even in larger sizes it will not be sturdy and its design allows for jaw lift with heavier clamping (its not a Kurt clone design). I say its main use would be for light milling where parts have to be frequently at an angle. I would not pick it up as my primary vise. Most pp including myself remove or never get a swivel base with their milling vise to make it more sturdy.
Also the ability to tilt means it is quite high of the table as compared to the same vise without tilt and swivel base.
Here is Grizzly version on amazon -
https://www.amazon.ca/Grizzly-G7066...?keywords=tilting+vise&qid=1581013146&sr=8-13
Here is Grizzly without warranty brand - aka Woodstock -
https://www.amazon.ca/Woodstock-D41...?keywords=tilting+vise&qid=1581013252&sr=8-12
* note first bad 1 star review *
Note the review is from home shop user - see discussion here -
https://www.hobby-machinist.com/threads/tilting-vise.23161/
So here is review:
"Forget about using a set of parallels in this vise because the machined bed doesn't extend to the stationary jaw before it drops off. There are huge flaws in the casting. The tilt arches on the upper portion are so uneven, you can stand 6 feet away and see that one is only thick enough to ride on half of it's bed, while the other one covers it's bed completely.
Anyone using the word "precision" while referring to this vise had better watch out that God doesn't strike them down with lightening. Exceptionally bad Chinese junk. I didn't expect miracles for this price, but oh my GOD...this thing looks like it was put together by a kindergarten art class."
Note KBC vise is the same vise as Grizzly / Woodstock / etc as per pics.
I have not came across tilting vises from reputable makers - no tilting Kurt vises for example. The best is Wilton. It feels that tilting table is preferred solution or using adjustable angle blocks of different designs that you clamp into Kurt. Heck pp even just clamp another smaller tool makers vise into Kurt and set precision angle with a sine bar or angle blocks (that is what I do or do angle blocks and part alone).