Drill Hog® 5 Pc Cylindrical Spiral Flute Cobalt M42 Step Drill Bit 

Included Sizes:
3/16" to 1/2" Cylindrical Spiral Flute Step Drill Bit (6 Steps) 
6 Steps: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2"

1/8" to 1/2" Cylindrical Spiral Flute Step Drill Bit (13 Steps)
13 Steps:1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"

1/4" to 3/4" Cylindrical Spiral Flute Step Drill Bit (9 Steps)
9 Steps: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"

3/16" to 7/8" Cylindrical Spiral Flute Step Drill Bit (12 Steps)
12 Steps: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"

Specifications:
Finest Cobalt M42 Steel
Shank Size: 3/8" (1/4" to 3/4" & 3/16" to 7/8", 1/4" to 1-3/8")
Shank Size: 1/4" (3/16" to 1/2" & 1/8" to 1/2")
Cylindrical Spiral Flute Design Cuts Faster and Straighter
Cylindrical Spiral Flutes Automatically Deburr While you Drill
3 Flat Sides on the Shank so the Bit will Not "Spin" in the Chuck
Lifetime Warranty

Drill Hog is proud to release the newest technology in step drill bits. These bits are made from Cobalt M42 steel which has a melting point of 2723 Fahrenheit! This new design features the exclusive Cylindrical Spiral Flute design. 

The Cylindrical Spiral Flutes allow the bit to cut 39% faster than standard step drill bits. These bits will drill through the toughest steel like truck frames, stainless steel, farm implements, spring steel, grade-8 bolts, and more! 

Drill Hog includes a Lifetime Warranty to the original purchaser.