5 Pce 10-31mm 90 Degree HSS Co5 Triple Flute Countersink Set The crest is flat and

The crest is flat and the thread has clearance at the root allowing external thread and internal thread to engage well

Adaptor to suit 14-30mm hole saws

Ambidextrous thumb stud

and their temperature resistance allows faster machining

The universal 1/4" hex shank is suitable for use in most power tools and quick change adaptors/extensions

5 Pce 10-31mm 90 Degree HSS Co5 Triple Flute Countersink Set The crest is flat and5 Pce 10 31mm 90 Degree HSS Co5 Triple Flute Countersink Set Triple flute countersinks are ideal for countersinking and deburring in a wide range of materials including ferrous and non ferrous metals. The three fluted countersink is self centering with wide flutes and is used to provide a heavy chamfer in the entrance to a drilled hole. This may be required to allow the correct seating for a countersunk head screw or to provide the lead in for a