Cobalt Drill Bit Set 10PCS M35 Jobber Length Twist with Storage Case,1/16"-13/64" High-Quality Construction: M35 cobalt steel (5% cobalt) for increased wear and heat resistance Fully grounded for precise drilling diameters Upgraded Design for Efficiency: 135 split point for easier drilling in hard and soft materials Suitable for: stainless steel, cast iron, copper, aluminum, soft metals, plastics, wood Faster cutting speed due to fully ground surface and reduced friction Double helix chip removal groove for smooth drilling and chip removal Organized Storage: Convenient plastic storage case keeps drill bits organized and protected Variety of Sizes: 10-pack includes sizes: 1/16" (1.59mm), 5/64" (1.98mm), 3/32" (2.38mm), 7/64" (2.78mm), 1/8" (3.18mm), 9/64" (3.57mm), 5/32" (3.97mm), 11/64" (4.37mm), 3/16" (4.76mm), 13/64" (5.16mm) Covers a wide range of drilling needs