Features Mainly Used for: Carbon steel pipe taps are designed to clean and/or rethread to damage or block pipe threads. Suitable for stainless steel, iron, cast iron, alloy steel, carbon steel, abrasive steel materials Effenciently Thread Tap: Round shank, square end. Straight flute tools allow chips to collect in the Flutes as they cut and are well suited for most applications in shallow cuts. This high quality HSS thread tap can cut very well, and come with fast cutting speed The thread tap is made of high-speed steel materials, which brings high hardness 1/4‑18 tap provide high working efficiency, which saving both time and effort Specification: Item Type: Tap Standard: American System Number of Threads Per Inch: 18 Teeth Pitch: 1.41 Thread Tolerance Grade: H2 Material: High speed steel Thread Specification: 1/4 inch Tap Length: Approx. 6cm / 2.4in Useful Length of Tap: Approx. 2cm / 0.8in Shank Diameter: Approx. 1cm / 0.4in Package List: 1 x Tap  Package List 1 x Tap