CVO1006 Features: * Step drill * Made from special moly alloy steel and gold surface treated for maximum lubricity * Use for all thin metals, rigid plastics such as Plexiglas and wood or composite materials with a thickness equal to or less than the step thickness * Enlarges holes 0.25"" - 0.75"" * 9 Sizes, size increments: 1/16"" * Drilling steel with 1/8"" or greater thickness, a starter hole of the smallest step diameter will speed the drilling process Construction: * Dual flute construction drills clean accurate holes in thin materials Dimensions: * Dimensions: 1"" H x 1"" W x 4.18"" D Warranty: * 6 Month warranty on material and workmanship