·Material: High speed steel ·Use: Metal Drilling ·Hardness: HRC30-35 ·Coating: Tin, Ticn, Tiain ·Process: Fully Ground ·Standard: DIN340 ·Size: 0.5mm-20mm ·Packaging: Plastic Box, Carton ·Work-piece Material: Suitable for drilling generally steel, alloy steel under HRC 35, iron and stainless steel.