3PCS HSS Cobalt Step Drill Bit Set – 4–32mm, Nitrogen-Coated, Spiral Flute with Triangle Shank

📖 Description:

• A professional 3-piece step drill set made of high-speed steel (HSS) with cobalt and nitrogen coating for superior durability and heat resistance. Sizes range from 4–32mm, designed with spiral flutes and triangle shanks for stable, precise drilling in metal, aluminum, stainless steel, and plastic. Ideal for cone-shaped holes, deburring, and enlarging existing holes.

🔧 Technical Specifications:

• Material: High-Speed Steel (HSS) with cobalt alloy for increased hardness and heat resistance.
• Coating: Nitrogen treatment to reduce friction and extend tool life.
• Drilling Range: 4mm to 32mm, accommodating multiple hole sizes.
• Flute Design: Spiral grooves for efficient chip removal and smoother drilling.
• Shank Type: Triangle shank for a secure grip in drill chucks.
• Suitable Materials: Metal, aluminum, brass, plastic, wood, and other thin materials.​

⚙️ Key Features:

• Multi-Size Capability: Each bit can drill holes of various diameters, reducing the need for multiple tools.
• Durability: Cobalt alloy construction ensures long-lasting performance, even under high temperatures.
• Enhanced Cutting Efficiency: Spiral grooves facilitate faster drilling and cleaner cuts.
• Secure Handling: Triangle shank design prevents slippage during operation.​

🛠️ Applications:

• Electrical Installations: Creating holes for cable entries in panels.
• Automotive Work: Drilling holes in vehicle bodywork for accessories.
• DIY Projects: Suitable for various home improvement tasks involving different materials.
• Metal Fabrication: Ideal for drilling holes in sheet metal and other thin materials.