"IRWIN INDUSTRIAL TOOL" TITANIUM PRO DRILL BIT SET * Speedbor, 15 piece, titanium pro drill bit set * 1/16" through 3/8", lasts up to 10 times longer than standard hss drill bits * 140 degree split point for less walking & quicker starts * Cutting Edge Stays Sharper Longer & Tin Coating Reduces Friction * Application is for repetitive metal drilling with portable or stationary drill presses * Rugged storage case with rubber over mold for added impact resistance * Sliding latch design provides added security.