The Milwaukee® Red Helix™ cobalt drill bit is engineered for extreme durability and longer life in hard metal applications. The Milwaukee® cobalt drill bits are designed with a Variable Helix ™ that includes an aggressive 35° helix angle which ends at 15°. The 135° Split Point Tip™ delivers a precision start and prevents walking for fast, accurate holes in hard metal, PVC and wood.The tapered drill bits feature a new Enchanted Tapered Web™ that strengthens the bit's core to increase flute durability. The cobalt twist drill bits are ideal for tough applications, providing up to 15X life vs Black Oxide Drill Bits™ . Milwaukee® 48-89-2301 Red Helix™ Jobber Length Twist Drill Bit, 1/16 in, 0.0625 in Drill, 135° Point, Round Shank