Fractional Sizes in 1/64th Increments (Does not Skip any Sizes)
High Heat Treated Hardness 68-70 HRC (Rockwell Hardness Scale)
This complete master drill index solves the problem
Sizes: 1/2"
Drill Hog 44 Pc HI-Molybdenum M7 Drill Bit Set and Left Hand HI-Molybdenum M7 Drill Bit Set
Drill Hog® TURBO Spiral Flute Step Drill Bit Set Lifetime Warranty Fractional Sizes in 1/64th IncrementsDrill 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