Bending triangle wire

Hello Orchidians:

I buy 6mm x 4.75 mm triangle shaped wire for one of the rings that I
make. I shave it down so it’s closer to 5mm when I am done though. I
am looking for some kind of ring bender out there so I can stop
struggling with trying to get it to the right ring sizes. All the
ring benders I have seen out there don’t say anything about bending
triangle shaped wire so I am wondering, will some of them do it
anyway (on account of having one flat side in the triangle) but
don’t advertise it or can they just not do it?