High-speed steel stepped, titanium triangular round handle conical drill bits [13 steps: 535 mm]

[Step Drill Bit Size]: 5-35 mm (5 mm, 7 mm, 10 mm, 12 mm, 15 mm, 17 mm, 20 mm, 22 mm, 25 mm, 27 mm, 30 mm, 32 mm, 35 mm). A variety of drill bits can meet your different needs, saving you time and money. [Premium Materials]: These step drill bits are made of heat-treated 4241 high-speed steel (HSS) and coated with titanium nitride. The titanium coating reduces friction and operating temperature, effectively extending the service life. [Stepped Structure]: The drill bit can drill holes of various sizes without the need to purchase multiple drill bits, saving space and money. [Double Flute]: Automatic deburring during drilling. Faster and smoother cutting. Three flat handles ensure a firm grip. Triangular round shank: Can be easily installed in a power screwdriver, drill, or pressure drill. [Applies to]: The stepped drill bit set can be used for workpieces with a hardness of less than 25 and a thickness of less than 5 mm. Suitable for various materials, such as carbon steel, sheet iron, insulation boards, PVC boards, wood panels, and wood, etc. They also help enlarge existing holes but are not recommended for stainless steel. Specifications: Color: Silver. Material: 4241 high-speed steel. Surface: Titanium plated. Shank type: Triangular round handle. Shank size: 23 x 12 mm. Size: 5-35 mm (5, 7, 10, 12, 15, 17, 20, 22, 25, 27, 30, 32, 35 mm). Application: Material thickness of 5 mm. For sheet metal: Step drills are preferably used on thin materials, which fits the description of sheet metal. Sheet metal work also requires a number of holes of different sizes, meaning workers must constantly change their drill bits. Since a single-step drill can change to several different sizes, you will save time by using these drills for sheet metal work. For milling: Another purpose of step drills is to use them as milling cutters. Because they are so versatile, they work very well for securing screws and fasteners underneath a surface. When drilling holes in the opposite side of materials, small drill bits are perfect for this task. This is a good technique for reinforcing bolts and other fasteners, as well as adding stability to various construction projects. For automotive repair: Another excellent use for step drill bits is in automotive repair projects. Most body shops use many multi-stage drill bits for car restoration projects, making it a costly and time-consuming job. However, with step drill bits, they can stick to a single bit and save time by requiring fewer drill bits. Tips: 1. To prevent debris from injuring your eyes, please take protective measures when using these bits. Due to manual measurement, the indicated sizes may vary by 0 to 3 mm, which is perfectly normal. Due to lighting effects or monitor brightness/contrast settings, slight color variations may occur between the photo on the website and the actual item. Package contents: 1 x 5-35 mm step drill bit (silver). Quantity supplied: 1 piece