Counter sink 82 degree Single flute Norseman 1/4"

No chatter design with a single flute gives a much smoother finish than a counter sink with multiple flutes or the cheap quad edge counter sinks. Special Hi-Molybdenum tool steel. The 82 degree counter sinks are hard to find and match the typical flat head folder screw heads pitch.

Note that both ends can be used so it's really 2 tools priced for one.