Micro-smooth CNC precision ground for clean smooth cutting without smearing.
M35 Cobalt: 6% Tungsten, 5% Moly, 5% Cobalt - for long tool life in all types of materials.
Cam relieved for totally chatter free cuts.
Through-hole design that is easy to resharpen using a small grinding wheel in the cross-hole.

KEO ZErO flute countersink and deburring tools are simple, all-purpose tools made of Cobalt that provide flawless countersinking and deburring. The chatter-free cutting action requires minimal power. The micro-smooth CNC precision ground construction produces clean, smooth cutting without smearing on a variety of materials. The tool expecially excels in countersinking or deburring holes in aluminum, plastics and other nonmetallics.