The spiral flute design pulls chips back toward the tap, so chips won't accumulate in closed-end holes. With no need to reverse while tapping, these taps produce threads more efficiently than standard taps and are often used for production work. They're made of high speed steel for cutting into most metal and plastic. However, they’re not recommended for tapping material with fine or powdery chips that may fall back into the hole and damage the tap or the workpiece.

Titanium-carbonitride (TiCN) coated taps have up to three times the tool life of uncoated taps. Their hard, smooth finish offers superior resistance to chipping, wear, and heat.

Bottoming-chamfer taps cut into the workpiece with just 1-2 chamfered threads. This short chamfer lets them thread holes closer to the bottom than other taps, but they require more torque to start threads.

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