Drill Hog 5 Pc Turbo Spiral Flute Cobalt M42 Step Drill Bit 

Included Sizes:
3/16" to 1/2" 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" 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" 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" 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:
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")
New Spiral Flute Design Cuts Faster and Straighter
Two Flute Design Automatically Deburrs 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 spiral flute design. The spiral flutes allow the bit to cut 27% 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.