Irwin Speedbor Multi Size in. Dia. Carbon Steel Wood Boring Bit Quick-Change Hex Shank 6 pc.

Speedbor maximum Drill Bit Set, Speedbor maximum Drill Bit, standard length, tri-flute design for faster chip ejection, cutting spurs have 3 cutting edges for added durability, full screw tip allows bit to self feed, grooved Hex shank prevents slipping in drill chuck or bit extension, fits all standard 1/4 inch quick change chucks.
The fastest speedbor spade bit ever
Tri flute design for fastest chip ejection
Cutting spurs have 3 cutting edges for added durability
Full screw tip allows bit to self feed
Grooved hex shank prevents slipping in drill chuck or bit
Fits all standard 1/4 in. quick change chucks
Comes with a heavy duty case
Set includes 1/2 in., 5/8 in., 3/4 in., 7/8 in., 1 in. and 1-1/4 in. bits