Irwin / Hanson / Vise Grip (IRW10233)
#3 Unibit Step Drill, 1/4" - 3/4", 9 Sizes, 1/8"
Single concave flute design creates perfectly round holes in thin materials including steel, brass, copper, and aluminum. Constructed of industrial grade, high speed molybdenum steel.
Graduated in 1/32" increments to drill 9 hole sizes from 1/4" - 3/4". 1/8" shank.