Drill bit set DeWalt DT7522-QZ — 2-piece HSS twist drill bits

DeWalt DT7522-QZ is a compact 2-piece set of HSS twist drill bits designed for general-purpose metalworking and everyday workshop tasks. The set includes two precision-ground high-speed steel bits engineered to deliver consistent hole quality and extended service life when used for drilling into metallic materials and other common substrates. The small-format kit suits portable toolboxes and on-site work where reliable cutting performance and standard straight-shank compatibility are required.

Advantages

The high-speed steel construction provides good hardness and heat resistance for sustained drilling in metals and mixed materials. Precision ground flutes and cutting edges ensure accurate centring and clean chip evacuation, reducing the need for rework. The two-size selection covers frequent hole-diameter needs while keeping the kit compact. Straight shanks fit typical drill chucks, making the bits compatible with handheld drills and bench machines used in workshops and professional settings.

Suitable for

• Drilling holes in mild steel, sheet metal and non-ferrous metals
• General workshop maintenance and fabrication tasks
• On-site repair and installation work requiring portable tooling
• Prototype and small-series metalworking where basic HSS performance is sufficient

Key specifications

• Material: high-speed steel (HSS)
• Quantity: 2 twist drill bits
• Flute type: standard spiral flutes for chip removal
• Shank type: straight shank for standard drill chucks
• Intended materials: metals and common workshop substrates

How to use

Select the appropriate bit from the set for the required hole diameter and secure it tightly in the drill chuck. Mark the drilling point and, if necessary, use a centre punch to improve accuracy. Start drilling at low speed to establish the hole, then increase speed as appropriate for the material and drill size. Apply cutting lubricant when drilling harder metals to reduce heat and prolong bit life. Clear chips periodically to avoid clogging and maintain cutting efficiency.

Usage recommendations

Use appropriate personal protective equipment such as safety glasses and gloves. Match drill speed and feed pressure to the material being drilled: lower speeds and steady pressure for harder metals, medium speeds for non-ferrous metals and faster speeds for thin sheet work. Re-sharpen or replace bits when edges show wear to maintain hole quality and safety.