From the Manufacturer
Speedbor 2000 Wood Boring Bits, 1-inch diameter and 6 inches long, for 1/4-inch and larger electric drills. Bits are forged in one piece from Irwin's own special grade tool steel and heat-treated full length for extra overall strength. Micro-groove point and cutting edges have extended spurs for faster, cleaner boring action; bores two times faster, lasts three times longer. Irwin tools are made of only the finest materials, manufactured to exacting tolerances.
Product Description
Speedbor, 1" Spade Drill Bit.