The hardest and most wear-resistant bits, the flutes clear chips and improve coolant flow. They prevent clogs and dissipate heat that can damage the bit and the hole. Carbide bits 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 cobalt steel. Carbide can be brittle, however, so these bits require a rigid machine tool holder to prevent breakage and should not be used in hand drilling applications.

Drill and thread holes for pipe and conduit without switching tools. Made of uncoated high-speed steel, these taps are for use on most metal and plastic. With a square shank, they’re compatible with tap wrenches and tap holders for drill presses and milling machines. These taps have a plug chamfer with 3-5 chamfered cutting threads, so they’re suitable for start-to-finish tapping of through holes.

Use these end mills for general purpose milling in most material, such as aluminum, brass, bronze, iron, and steel. They have a square end for milling square slots, pockets, and edges.

End mills with fewer flutes provide better chip clearance for high-volume, high-speed plunge, slotting, and roughing cuts; end mills with more flutes provide a finer finish and operate with less vibration when run at high speeds.