YURINWOO Diamond Grinding Burr Drill Bit, 20 PCS Diamond Burr Set with 1/8 Inch Shank Universal Fitment Rotary Tool Accessories for Stone Carving, DIY Grinding, Polishing, Engraving

Bought these to play around with rock polishing and shaping, and they're working really well. I've worked down five or six quartz and quartzite stones so far using just one burr bit, and that bit is still going strong.Keep in mind that 60 grit is going to leave your pieces very rough and is ONLY for getting everything even, roughly shaped, and relatively leveled out. If you're working with smaller items, don't use these to work your piece down to the size you want your finished product to be; leave room for all the other polishing steps that will follow.I don't know what the rules are for woodworking, but with stone polishing, you have to keep your piece constantly wet to prevent overheating your machine and/or melting your burrs. You can get or make a system that drips down as you work, or you can just have a container of water beside you to dip your stone into, as well as your burr bit occasionally as you're working, as that will remove debris and keep a consistent texture.

Durable, hardy, good texture. I have been using these to restore cedar signs and they are working every bit as well as I'd hoped. Great product for the price.

Me gustaron mucho, aunque las uso poco para su función lo hacen muy bien, las recomiendo

Schnell und gut geliefert, funktioniert.

Ottima qualità, ma gambo mm.3 e non 3,2 per Dremel. Ci sono pezzi ripetuti. Sarebbero stati più utili se avessero avuto diametri differenti, manca un disco per incisione.