ZFE M12x1.75mm Pitch HSS Metric Left Hand Tap Machine Plug Tap Size:M12x1.75mm,High-speed steel for compatibility with a variety of materials Available in Metric Coarse (M) or Metric Fine (MF) Left-hand thread options for different Hand threading tap with straight flutes cuts threads in through holes and blind holes Uncoated (bright) tools have no additional surface treatment or coating Round shank with square end allows tap to be used in hand or power-driven applications