I got mine used, I love them. They give a very nice flat cut, but they can be unforgiving in the wrong hands due to their ability to cut the hoof like its butter. They are MUCH easier than regula nippers, and are truely able to be used with one hand. Since they have a spring in them they open on their own, no trying to manipulate a finger between the grips to get them to pull out of the hoof, they pop right open.
I don't think the company is in bussiness any longer, would love to know if they are. Blades can be sharpened on a honing stone with oil. You only sharpen the inside edge to keep the angle. I had to smooth out some nicks because, like a dummy, in a moment of stupidity, I used them to cut something I shouldn't have.
I think someone that does metal fabrication could creat new blades if push came to shove.
With all of that said, I must say I found that the Barracuda hoof nippers are an excellant tool when it comes to keeping a heel flat without trimming off too much. A few years back I had a mare come to me with longish toes and rolled heels, toes weren't an issue trimming but it was a challange to get/keep the heel opened up and keep a flat surface.
Her feet look wonderful now.