Overview Product Description High Speed Steel Drills Roll Forged Steam Tempered Finish Suitable for use in hand and power drills. Suitable materials: cast steel, grey cast iron, malleable cast iron, nickel, brass and graphite. Product Videos Custom Field Product Reviews Write a Review Write a Review × Metric HSS Roll Forged Drill Bits Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *