3pcs Step Drill Set — Metric

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A three-piece step drill set is a specialized tool kit designed for drilling holes with varying diameters in materials such as metal, plastic, or wood. Each drill in the set has multiple steps or graduated levels with increasing diameters. This enables users to drill different-sized holes using a single tool by gradually stepping up the size in predetermined increments. Step drill sets are commonly used in various applications, including electrical work, metal fabrication, and general construction, where precise hole sizes are required.

1. Material: HSS4241.
2. HRC 60-63
3. Titanium coated
4. For steel sheets, aluminum sheets, wood board, plastic board etc
5. Packed by double blister card.



  1. Metalworking: Step drill sets are frequently used in metal fabrication and machining. They can efficiently create holes in metals like aluminum, steel, and brass with precision and ease.
  2. Electrical Work: Electricians often use step drills for enlarging holes in electrical panels or junction boxes to accommodate different sizes of conduit fittings, cable glands, or wiring connectors.
  3. Automotive Repair: Mechanics use step drills for drilling holes in automotive bodies or components, such as when installing brackets, mounting accessories, or customizing parts.
  4. Plumbing: Plumbers use step drill sets to create holes in pipes or other plumbing fixtures. The stepped design allows for drilling holes of various sizes to accommodate different pipe fittings.
  5. Woodworking: While not as common in woodworking as in metalworking, step drill sets can be used to drill precise holes in wood for various purposes, such as installing dowels or creating countersink holes.
  6. DIY and Home Improvement: Step drills are handy for general DIY projects around the house. They can be used for tasks like installing locks, handles, or hinges, where a range of hole sizes may be needed.
  7. Sheet Metal Work: Step drill sets are ideal for drilling holes in sheet metal, where a smooth, clean edge is important. They can be used for tasks like creating openings for vents or access points.
  8. Cable Routing: In the field of cable management, step drills can be used to create holes for routing cables through panels, walls, or other structures.
  9. Aerospace Industry: In aerospace applications, where precision and weight considerations are crucial, step drill sets are used to create accurately sized holes in aircraft components.
  10. Maintenance and Repairs: Step drills are valuable for general maintenance and repair work where drilling holes of different sizes is required, providing a versatile solution in a single tool.
SKU: AHS26794 Category:


4 – 12 MM , 4 – 20MM, 4 – 32 MM

Safety Precautions

  1. Personal Protective Equipment (PPE):
    • Eye Protection: Always wear safety glasses or goggles to protect your eyes from flying debris and metal chips.
    • Ear Protection: If the drilling operation produces loud noise, use earplugs or earmuffs to protect your hearing.
  2. Clothing and Accessories:
    • Wear Appropriate Clothing: Avoid loose-fitting clothing or accessories that may get caught in the tool.
    • Tie Back Long Hair: If you have long hair, tie it back or secure it to prevent it from getting entangled in the tool.
  3. Secure Workpiece:
    • Secure Material: Ensure the workpiece is firmly secured in a stable position before starting the drilling process. Use clamps or other appropriate methods to prevent movement.
  4. Work Environment:
    • Well-Ventilated Area: Work in a well-ventilated area to avoid inhaling dust or fumes generated during the drilling process.
    • Clean Work Area: Keep the work area clean and free of clutter to prevent tripping hazards.
  5. Tool Inspection:
    • Inspect the Tool: Before use, inspect the step drill set for any damage or defects. Ensure that the cutting edges are sharp and in good condition.
    • Correct Tool for the Job: Use the appropriate step drill for the specific task at hand, and ensure it is suitable for the material you are working with.
  6. Proper Technique:
    • Stable Stance: Maintain a stable and balanced stance while operating the drill. Use both hands to control the tool.
    • Controlled Pressure: Apply consistent and controlled pressure when drilling. Avoid excessive force, as it may lead to loss of control.
  7. Cooling and Lubrication:
    • Use Lubrication: For metalworking applications, use a suitable cutting fluid or lubricant to reduce heat and prolong tool life. Follow manufacturer recommendations.
  8. Avoid Excessive Speed:
    • Follow Speed Recommendations: Operate the drill at the recommended speed for the material being drilled. Excessive speed can lead to overheating and premature wear.
  9. Emergency Preparedness:
    • Know Emergency Procedures: Be familiar with emergency procedures, including the location of emergency shut-off switches and first aid supplies.
  10. Follow Manufacturer’s Instructions:
    • Read the Manual: Familiarize yourself with the manufacturer’s instructions and guidelines for using the step drill set. Follow recommended operating procedures.


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