Cobalt countersink chamfering tool, HSS-E material, Nanometer Titanium coated, durable high hardness, self centering 90 degr

This countersink is used for countersink processing, deburring, chamfering and revise the edge of the holes or enlarge the edge of holes. Material: made of HSS-E material ( high speed steel with the cobalt included), offering a good combination of hardness and toughness for wear-out resistance. The finish is titanium coated, sturdy and durable, not easy to rust, long service life. Drill processing effect: processed holes are bright & clean, auto self centering and holes mouth is round and smooth