Thunderbolt Web, 15 Piece, Jobber Length, Black Oxide Drill Bit Set, Includes: 1 Each 1/16", 1 Each 5/64", 1 Each 3/32", 1 Each 7/64", 1 Each 1/8", 1 Each 9/64", 1 Each 5/32", 1 Each 11/64", 1 Each 3/16", 1 Each 13/64", 1 Each 7/32", 1 Each 1/4", 1 Each 9/32", 1 Each 5/16", 1 Each 3/8", With Indexed Case, Provides Longer Life & Faster Driller Times, Parabolic Flute, Clears Chips Faster, 135 Degree Split Point, Precision Start No Walking, 3 Flat Secure Grip Shank, Reduces Bit Slipping In Chuck, Clamshell Packaging.