and high quality Features: The step drill bit is made from high speed steel with high hardness and good wear resistance. Surface is coated with titanium which gives the drill bit a beautiful gold color and will not fade easily. This single drill bit can be used for drilling a wide range of hole sizes from 3mm to 13mm. It is most commonly used on softer materials such as thin iron sheet, aluminum, PVC, and wood board of 5mm or thinner. Step drill is great for use in work where thin steel, aluminum, or plastic boxes and chassis are encountered. Step drill bit only, other accessories shown in the picture are not included. Specification: Material: High Speed Steel Surface Finishing: Titanium Coating Step Sizes: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm Hex Shank: 1/4 inch Size: approximately 76.24 x 6.2mm / 3 x 0.24in Color: As shown in pictures Quantity: 1 Piece Note: Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before purchasing. Due to differences between monitor displays, the picture may not reflect the actual color of the item. Thank you. Package Contents: 1 x Step Drill Bit