Designed for impact drivers with 1/4 impact rated shank 7/8 Diameter. Blue-Groove point and cutting edge for faster chip removal - 4x faster than standard spade bits. Sold as Each The improved SPEEDBOR Spade Bits now last 2X Longer* and cut 2X Faster*. Spade Bits - Irwin - Hand Tools - Hardware Spade Drill Bit Irwin Tools 1882781 SPEEDBOR Countersink Wood Drill Bit, Number-6 IRWIN SPEEDBOR Spade Bit 7/8 Inch Chamfered cutting edges for increased durability If you need spade drill bits from brands like Irwin Speedbor or Bosch, you need Hartville Hardware, America's largest hardware store Patented Blue-GrooveTM cutting edge allows for a large cutting area for aggressive removal of wood chips and fast drilling. Next-generation SPEEDBOR® Spade Bits feature a chamfered cutting edge for durability in cutting wood and optimized point tip that is wider and longer than previous IRWIN spade bits to minimize splintering and control speed.
