Irwin Turbomax 1/2 in. Dia. x 4-1/4 in. L Steel Impact Ready Drill Bit 1/4 in. Quick-Change Hex Shank

IRWIN Impact Performance Series TURBOMAX Drill Bits are engineered for maximum durability and long life with impact drivers. They feature a one-piece construction that withstands higher torque loads than standard quick change bits that are built with a two-piece design. They have an exclusive TURBOMAX tip that eliminates "walking," gets 10X faster starts and stays sharp longer. These bits are made from premium high speed steel with a black and gold oxide finish that resists corrosion. Plus, they have a 1/4" quick change shank that's designed to work with impact drivers, as well as reduce slipping when used in standard drill chucks.10X faster penetration than standard bits.