Hand Taps Set HSS DIN 2181, 2-piece Metric ISO fine thread according to DIN 13 tolerance class ISO 2 (6h)Material: HSS = High Speed SteelFor easily machinable steels up to 750 N / mm² Thread Size: M 20Pitch: 1.50 mmShank Outside Square: 12.0 mm Contents: 1 Pre and plug