Features 1、Can be used for stainless steel, iron, cast iron, alloy steel, carbon steel, abrasive steel materials 2、Iron and other difficult‑to‑machine metal materials can be malleable with this tap 3、This HSS thread tap can cut very well, come with high quality and fast cutting speed 4、Using high‑speed steel materials, which brings high hardness, high wear resistance and heat resistance 5、HSS ZG 1/8‑28 tap have high working efficiency, which saving both time and effort Specification Item Type: Tap Standard: American System Number of Threads Per Inch: 28 Teeth Thread Taper: 55° Pitch: 0.94 Thread Tolerance Grade: H2 Material: High speed steel Thread Specification: 1/8 inch Tap Length: Approx. 5.5cm / 2.2in Useful Length of Tap: Approx. 1.7cm / 0.7in Shank Diameter: Approx. 0.6cm / 0.2in Package List 2 x Tap