Check the listing for details. 2pack Spiral Flute Thread Taps 1/4-28 UNF 2B Machine Titanium Coated Screw. Condition: New. Listed at 20.49 USD. Specifications:Thread Size: 1/4-28 UNFTolerance: 2BThread Length: 25mm / 1"Square End Size: 4.9mm / 0.19"Round Shank Dia.: 6mm / 0.24"Total Length: 70mm / 2.76"Material: M2 High-Speed Steel (HSS6542)Finish: Titanium CoatedCutting Direction: Right HandPackage Included: 2 x Spiral Flute Thread TapsDescriptions:The spiral flute design ensures smooth chip evacuation, prevents breakage, and enables more efficient tapping. The spiral tip of the tap helps guide it into the hole, reducing the torque required to turn it, and the flutes easily remove chips and debris from the hole and machine.Spiral flute thread taps are suitable for machining blind or deep holes and sticky materials, and can be used for tapping stainless steel, aluminum, cast iron, alloy steel, ordinary steel, non-ferrous metals, hard plastics, etc.