29 piece drill set comes with drill bits from 1/16 to 1/2 by 1/64 increments. Drill bits are HSS jobber length drill bits. They are dependable, general purpose drill bits designed to perform in a wide range of materials in the iron and steel families. Ideal for production, maintenance or portable drilling jobs. Surface treated with abrasion-resistant black oxide. Drill set comes with a rust resistant, water and shatter proof case.