5 Pce 10-31mm 90 Degree HSS Co5 Triple Flute Countersink Set They are used for threading

They are used for threading rods

Fits 1/2" chuck drills

fibreglass

Canada and the UK

Suitable for use with 32-210mm hole saws

5 Pce 10-31mm 90 Degree HSS Co5 Triple Flute Countersink Set They are used for threading5 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