Description: 3 Piece High Speed Steel Step Drill Set Made from high quality HSS steel Suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc Material: HSS Steel Deburring, chamfering, elliptic hole enlargement, twist drill, drill, bench drill Specification: Material: HSS Color: As pictures show Shank Diameter: Approx. 9mm/ 0.35inch Size: 1/2" to 3/16"; 3/4" to 1/4" ; 7/8" to 3/16" Package Includes: 3 Pieces Step Drills Set Note: Please allow 1-2mm differs due to manual measurement, thanks. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, Thank you!