SURBHI CHEMS' Diamond BUR 20PC. Set

Good quality

me funcionaron muy bien para mi herramienta, exelente calidad a buen precio

These work great in my rotary tool and flex shaft attachment. I got them to carve, etch, & generally shape stones (small pebble & river rocks for art). They worked great & I continue to find new uses for them all the time. My mother-in-law makes stained glass art & needed a few diamond drill bit (she has a big glass cutting machine & a dremel as well). While she was waiting for them to arrive - I offered to let her use my set of diamond bits, so she could try them out. She KEPT them, and sent me with $ to buy more!! LOL. Awesome product, arrived on time. And, I have already recommended them to friends and family. If your on the fence, buy them. They are worth it.

bonne qualité pour le verre

I bought these for one job, and they worked perfectly. I needed a diamond coating because I wanted to enlarge the, detente hole, on an, aviation spark-plug, socket. (hardened steel) The bit I chose, cut fast and retained it's sharpness/diamond grit. In fact, I could not tell I had used it, at all. They fit a standard Dremel 1/8" chuck. They are, most absurdly, made in China, but they are not junk. Very well made, and the small case, they came in, is nice as well. I am very pleased.

Work well, keep their grit for a decent amount of use/time.