Vermont American 12635 13 Piece 1/16-Inch to 1/4-Inch Cobalt Twist Drill Bit Assortment in Metal Index Cobalt drill bits offer the best heat resistance for drilling in extremely hard and abrasive materials including stainless steel, titanium and cast iron. The 135??? split point ensures a fast start with no walking or skating Bit sizes smaller than 1/8" have 118??? standard point Ideal for contractors, maintenance, machine shops and garages Lifetime Replacement Policy