No flutes, no chips. Press threads into material for zero buildup to slow you down or damage the tap. Since these displace rather than cut material, they create stronger, cleaner threads. They require an exact hole size, however, or tapping can be difficult and result in weak threads. Fluteless taps are faster and require more force to drive than fluted taps, so they're commonly used in production work on a milling machine. Also known as cold-forming taps.