Irwin Drill Bit Set, Size: 13/16" minimum diameter, 1-3/8" maximum diameter, 1/16" incremental diameter, 1/2" shank, Number of holes: 10, Brand: UNIBIT MAX Material thickness: 1/8"

Irwin Step Drill Bit, Size: 3/16" minimum diameter, 7/8" maximum diameter, 1/16" incremetal diameter, 3/8" shank, 1/6" Increments, Number of holes: 12, Material: Titanium nitride coated coating,...

Irwin Step Drill Bit, Type: #13 UNIBIT Step Drill, Size: 1-1/8", Number of holes: 1

Drill Bit Set, 26 Hole Sizes (3/16"-1/2"), 1/16" Increments

Drill Bit Set, 1 13 Hole Sizes (1/8"-1/2"), 1/32" Increments

Drill Bit Set, 20 8 Hole Sizes (9/16"-1"), 1/16" Increments - Hole Enlarging