GROUP B CARBIDE BURR #18

The double cut edges eat through plastic like butter and leave a finish that needs almost no sanding afterward. I've used it on a few pieces of walnut too, and it didn't clog up once. Exactly what I needed for my rotary tool.

I was a little worried it might be too aggressive for my plastic hobby parts, but the double cut actually leaves a surprisingly smooth finish. It carved through an ABS project in half the time my old file took.

The double cut on this burr is no joke—it chewed through some oak scraps way faster than my old single-cut bit. Leaves a surprisingly smooth surface on plastic too, which was a nice bonus.