Step drills are used for cutting varying hole sizes in material up to 4mm thick without changing the drill bit. Each drill cuts parallel holes within a specific size range, rising in 2mm increments. Made from HSS (High Speed Steel)._x000D_ _x000D_ Description: HSS Step Drill _x000D_ Size: 6 to 30mm_x000D_ Increment: 2mm_x000D_ Step Depth: 4mm_x000D_ Shank: 10mm_x000D_ Step drills are used for cutting varying hole sizes in material up to 4mm thick without changing the drill bit Each drill cuts parallel holes within a specific size range, rising in 2mm increments. Made from HSS (High Speed Steel). Step Depth: 4mm. Shank: 10mm Model FAISD630 Brand Name Faithfull Shank Type Straight Item Weight 0.15 Kilograms Part Number FAISD630 Finish Types Polished Manufacturer Faithfull Material Type High Speed Steel (HSS) Item Type Name HSS Step Drill Item Dimensions 1.77 x 2.95 x 6.3 inches Tool Flute Type Spiral Number of Flutes 2 Number of Pieces 1 Included Components HSS Step Drill Bit 6-30mm Cutting Angle String 118 Degrees Minimum Bore Diameter 6 Millimeters Surface Recommendation Metal Global Trade Identification Number 05023969272733 EU Spare Part Availability Duration 1 Years