Drill bit set DeWalt DT7520-QZ — 10 pieces HSS, metal drilling

DeWalt DT7520-QZ is a 10-piece set of HSS drill bits designed for drilling metal and general-purpose workshop tasks. The kit includes ten high-speed steel bits with geometry and hardness suited to cutting through various ferrous and non-ferrous metals. Intended for use with hand drills and drill presses, this drill bit set is engineered to deliver consistent hole quality and extended life under normal workshop conditions.

Advantages

The high-speed steel composition offers elevated heat resistance compared with standard carbon steel, reducing wear during extended operation. Precision-ground flutes and points provide reliable centring and smooth chip evacuation for clean holes. The set covers a range of commonly used diameters, enabling flexibility across multiple metalworking tasks. Compatibility with both hand-held drills and bench drills ensures versatile application in professional and DIY environments.

Suitable for

• Drilling holes in mild steel, aluminium and other non-hardened metals
• General workshop and maintenance tasks
• Use with hand drills and drill presses
• Professional metalworking and DIY projects requiring durable bits

Key specifications

• Quantity: 10 drill bits
• Material: High-speed steel (HSS)
• Intended use: Metal drilling and general-purpose workshop use
• Compatibility: Suitable for hand drills and drill presses
• Finish: Precision ground flutes and pointed tips for centring and chip removal

How to use

Select the appropriate drill bit diameter for the required hole size and secure it in the drill chuck. When drilling metal, start at moderate speed and apply steady, even pressure; avoid excessive feed that can cause bit overheating. Use cutting fluid or lubricant for cleaner cuts and longer tool life, and periodically withdraw the bit to clear chips. For finished holes, consider stepping up to the final diameter with a smaller pilot hole if necessary.

Usage recommendations

To maximize performance and life of the HSS drill bits, use a suitable cutting lubricant when drilling metals, maintain recommended drill speeds for the material, and ensure the drill chuck holds the bit firmly to prevent wobble. Inspect bits for wear or damage before use and replace when cutting performance degrades.