High-Speed Steel Black Gold Drill Bit (21 Piece/Set)

Industrial steel construction withstands high temperatures and maintains sharpness. Precision ground point flutes, body, clearance and drill diameter for the ultimate in accuracy and performance. Black and bronze oxide surface treatments reduce friction. Specially designed for hand-held drills. 3-flat shank design eliminates slippage and provides a positive grip. Ideal for drilling in wood, high carbon steel, stainless steel and other hard metals.