Fully Ground. -Finish: Polished. -DIN338, type N, 135 degree cutting angle. -Fully ground true metric sizes. -Split point from 3mm up and widely used by locksmiths. -Suitable for drilling stainless steel and most types of tougher, high tensile steel. -An engineering grade bit designed for durability and accuracy. -Suitable for drilling most types of steel, iron, wood, MDF and hard plastics.