Description of Tungsten Carbide 3 175Mm JEWELRY PRODUCTION
1/8" 3.175mm shank. Shipped in protective plastic case. Japanese made tungsten carbide bits. Multi-use: CNC, PCB, Jewelry, Toy Making, Installation. Please contact us for special orders.
I've used the smallest bit to drill through 8 thin sterling wires and you can see it wearing down. For the money they cost I expected them to last more than 5 minutes.
Maybe my fault but I didn't even use them and they all broke. When they closed the plastic case after an excited show in front of their jeweler pal, all but one of the drill bits broke. Maybe these are great beats, but be careful when closing this case!
I recently purchased an old gas grill that was converted to run on natural gas. To convert it back to propane I needed jets with a smaller bore. I was able to find a company that sells replacement nozzles but they have smaller holes that you will need to adjust to suit your needs. These drills were just what I needed for the job. Despite being as careful as possible, I broke a few of them in the process. But considering how small and fragile they are, I wouldn't give them credit for that…