مثقاب كربيد برأس كروي 1/4" × 1/4"

That tiny ball-shaped burr cuts through aluminum like butter and leaves such a smooth finish I barely need to sand afterward. Perfect for rounding out slots in softer metals.

I've been using this ball end burr for about a week now on some aluminum, and the carbide teeth still look sharp as the day it arrived. The 1/4" size fits my rotary tool perfectly, and it cuts through material without grabbing.

I was a little worried about the size being too small for my work, but this 1/4" carbide burr bites into aluminum just right without chattering. The ball end shape lets me get into tight spots for finishing.