82° included angle
Self-piloting and completely chatterless no secondary burs formed
Each size may be used on a wide range of hole diameters
Black oxide surface treatment to prolong tool life
The single flute countersink designed for general purpose countersinking, chamfering or deburring
Use on a machine tool or in hand-held tool applications easily resharpened
CAUTION: Any cutting tool may break or shatter under improper use. Government regulations require use of safety glasses and other appropriate safety equipment at all times in the vicinity of use.