When one end dulls, turn the countersink around for a sharp edge.

More heat and abrasion resistant than high-speed steel, cobalt steel has better performance on hard-to-machine materials.

Often used to cut hard and abrasive materials, these carbide countersinks are harder, stronger, and more wear resistant than cobalt steel and high-speed steel countersinks.

With more heat and abrasion resistance than high-speed steel countersinks, these have better performance on hard-to-machine materials.

An 82° countersink angle is compatible with the profile of flat- and oval-head inch screws; a 90° countersink angle is compatible with the profile of flat- and oval-head metric screws and is also good for deburring.

The 100° countersink angle is compatible with the profile of rivets.