High-Speed Steel—These versatile, wear-resistant center drills cut cleanly in most materials, including plastic, aluminum, and steel.

Carbide—The hardest and most wear-resistant center drills you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.

82° Countersink Angle—Start a hole with cone-shaped recesses so inch screws sit flush with the surface.

90° Countersink Angle—Start a hole with cone-shaped recesses so metric screws sit flush with the surface.

Uncoated—Suitable for most tasks, but won't last as long as coated center drills.

Titanium Carbon Nitride (TiCN) Coated—Resist heat, chipping, and wear, to last up to three times longer than an uncoated option.

Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these center drills cut metal as hard as Rockwell C50, such as iron and titanium, without chipping.

Aluminum Titanium Nitride (AlTiN) Coated—The hardest and most wear-resistant coating we offer, these center drills cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.