Irwin Speedbor Impact Extra Long 16" Spade Bit set - 3/8, 1/2, 5/8, 3/4, 7/8, 1" Irwin Speedbor Spade Bit set features six high-performance bits engineered for use with impact drivers. Each bit is equipped with a 1/4" impact-rated hex shank and Blue-Groove point and cutting edge for fast chip removal and efficient drilling. These 16-inch extra-long bits are designed for extended reach through multi-wood materials, offering chamfered corners for enhanced durability and superior hole quality. Measurements: • Length: 16" • Bit Sizes: 1", 7/8", 3/4", 5/8", 1/2", 3/8" • Shank: 1/4" Hex Impact Rated #Utility