Halls XD720 High Speed Steel De-burring Cutter 7mm to 20mm
is no longer available although you may find similar or newer versions below:
Shank: 1/4in Hexagon.
Diameter of cut 7 - 20mm (9/32 - 3/4 in).
A smooth cutting chatter-free high speed de-burring cutter, ideal for deburring and chamferring pre-drilled holes in a wide range of materials