(3/16 Inch, Pack Of 10) M35 5% Cobalt Twist Drill Bit Set For Hard Metal, Steel, TOP-NOTCH REINFORCEMENT: Crafted with first-rate materials for superior performance, our cobalt drill bits for steel are made with 5% cobalt, and their sharpness, durability, and resistance to breaking are significantly superior to those of drill bits made from M2 and M1 high speed steel materials. With a useful life up to 3 times longer than the average product, this is the last heavy duty drill bit set you?ll ever need to buy. UNPARALLELED PRECISION: No more shakiness or piercing the wrong place! Every piece in our drill bit set for metal has a firm, spiral groove design and split point design, giving it the ability to penetrate quickly, without friction, and with unmatched precision. Enjoy more efficient drill-work than ever and stop wasting time fixing unwanted mistakes. ROCK AND ROLL ALL DAY LONG: Our cobalt high speed steel drill bits for steel are passion project-friendly, meaning they can withstand day-long, prolonged use sessions! Drill to your heart?s content to get through your car repair queue, or squeeze the most out of your house work on your free days. ANY SURFACE IS GAME: Seamlessly get through broken studs and cut through the most daunting of surfaces! Our m35 hss cobalt drill bit set comes prepared with upgraded stability, durability, and high-heat resistance to pierce any surface you need, up to the millimeter. From Steel, Stainless Steel, Cold Rolled Steel, Hard metals, Sheet Metals, Aluminum Alloy, and Wood, to Hard Plastic? you name it! It is the single best cobalt drill bit set you?ll find! This Heavy Duty Work Cobalt Drill Bits Kit Include?3/16 inch x 10pcs (3-Flat Shank)