Somta Series 501 HSS Straight Flute Short Hand Second (Intermediate) Tap M3.5 x 0.6mm 25 Multi Spline Screw Extraction Extractor Kit broken bolt remover included with the product Insize Surface Roughness Specimen Set ISR CS2 included with the product making them suitable for a wide array of uses Designed for general hand tapping 6 (Metric)✔ Standard: ISO 529✔ Material: High Speed Steel (HSS) for enhanced strength and wear resistance✔ Thread Form: 60° flank angle for precision thread cutting✔ Tolerance Class: ISO 2 (6H) for a standard thread fit✔ Flute Type: Straight flute for effective chip removal✔ Lead Type: Intermediate lead for balanced cutting performance✔ Cutting Direction: Right hand cutting✔ Application: General purpose threading across various materials