No.68鑽頭（6入裝）

Broke the tip off a regular bit trying to make a tiny pilot hole for a model, but these #68 bits cut through the plastic like butter without chattering. The high-speed steel seems noticeably tougher than my old bits.

My precision-ground No. 68 bits arrived and put the cleanest little .031" holes I've ever gotten in thin brass sheet. They bit right into the metal without skating and came out still sharp enough to finish my whole circuit board project.

I needed a tiny drill bit for a delicate plastic model, and these #68 bits cut through it without any chipping or melting. The high-speed steel seems to stay sharp far longer than the cheap set I used before, which is exactly what I hoped for.