Irwin Speedbor Max Boring Bit Set

Set includes the following sizes: 5/8", 3/4" and 1"
Fits all standard 1/4" quick change chucks and for use with drills up to 1/2" shank
Tri-flute design for faster chip removal
3 cutting spurs for clean holes with minimal "breakout"
Six times faster than standard spade bits
Screw tip fully heat treated
Hex shank for quick change applications.
Tri-flute design for faster chip ejection
Full screw tip for ease of use and pull through
Cutting spurs for clean holes