This bit set included 3 different sizes of Unibit step drills in a vinyl pouch.
#1 Unibit: 13 hole sizes 1/8"-1/2" in 1/32" increments. 1/4" thick shank. For 1/8" thick material. #2 Unibit: 9 sizes 1/4"-3/4" in 1/16" increments. 3/8" shank. For 1/8" thick material. #3 Unibit: 6 sizes 3/16"-1/2" in 1/16" increments. 1/4" shank. For 3/8" thick material.