YG-1 Extra Length Dream Drill, Series: DH421, 8.6 mm Drill - Metric, 0.3386 in Drill - Decimal Inch, 142 mm Overall Length, 8XD Cutting Depth, Spiral Flute, 95 mm Flute Length, 10 mm Shank, Straight Shank, 140 deg Point, Split Point, Right Hand Cutting Direction, Micrograin Carbide Cutting Edge, Micrograin Carbide, TiAlN, Applicable Materials: Abrasive Plastic, Chilled Cast Iron, Cast Iron, Cast Steel, Malleable Cast Iron, Non-Ferrous Heavy Metal, Non-Ferrous Light Metal and Steel, Specifications Met: DIN 6537, Yes Through Coolant