Drill Bit Set DeWalt DT20663-QZ — 6-piece HSS drill bits

DeWalt DT20663-QZ is a 6-piece set of HSS drill bits designed for drilling metal and general-purpose applications. The compact assortment contains six commonly used diameters, providing a practical selection for workshop, construction and maintenance tasks. Manufactured from high-speed steel (HSS), these drill bits offer heat resistance and wear tolerance for repeated drilling operations, delivering consistent hole quality in a variety of ferrous and non-ferrous materials.

Advantages

The HSS construction ensures good hardness and thermal stability during prolonged use, reducing rapid wear when drilling metals. The set format provides immediate access to a range of sizes, saving time on tool changes and minimizing interruptions on the job. Each bit is ground to a conventional point geometry that supports reliable chip evacuation and controlled entry into the material, improving accuracy and reducing the risk of walking. The compact case protects the bits in storage and transport.

Suitable for

• Drilling steel, iron and other ferrous metals
• Drilling aluminium, brass and other non-ferrous metals
• General workshop and maintenance drilling tasks
• Portable drilling with hand drills and drill drivers
• Prototype work and small fabrication jobs

Key specifications

• Material: High-Speed Steel (HSS)
• Set quantity: 6 drill bits
• Application: Metal and general-purpose drilling
• Point geometry: Standard twist-drill point for general use
• Storage: Compact protective case for organization and transport

How to use

Secure the selected drill bit in the chuck of a drill or drill driver and tighten firmly. Mark the drilling point on the workpiece and, if necessary, use a center punch to prevent the bit from slipping. Start drilling at low speed to establish the hole, then increase speed appropriate to the material thickness and bit diameter while applying steady, moderate pressure. Use cutting fluid or coolant when drilling harder metals to extend tool life and improve chip removal. Retract the bit periodically on deep holes to clear chips.

Usage recommendations

Wear appropriate eye and hand protection when drilling. Match drill speed and feed rate to the material being worked, and use cutting fluid for stainless steel and other hard metals. Store the bits in their case to prevent damage and maintain sharpness.