Drill Bit Set DeWalt DT90237-QZ — 5-piece HSS twist bits

DeWalt DT90237-QZ is a 5-piece HSS twist drill bit set intended for general metal and wood drilling. The set contains five high-speed steel twist bits that deliver heat resistance and wear durability for routine workshop and construction tasks. Designed for compatibility with standard hand drills and drill presses, these HSS twist bits provide consistent hole quality for fastening, fabrication and repair jobs.

Advantages

The HSS material offers improved hardness and thermal stability compared with carbon steel, reducing wear during continuous drilling. The twist design enables efficient chip removal and stable drilling through a range of materials, while the precision ground flutes and tips help maintain concentricity and accurate hole diameters. The compact five-piece assortment covers common diameters, which simplifies selection for everyday tasks and minimizes tool changes.

Suitable for

• Drilling holes in mild steel and non‑ferrous metals
• Wood drilling and general carpentry applications
• Light fabrication, assembly and repair work
• Use with handheld electric drills and drill presses

Key specifications

• Material: high-speed steel (HSS)
• Bit type: twist drill bits
• Set size: 5 pieces covering common diameters
• Intended materials: metal and wood
• Shank style: straight round shank for standard chucks

How to use

Secure the chosen twist bit in the drill chuck and tighten according to the drill manufacturer’s instructions. Select an appropriate drill speed for the material: lower speeds for metal to reduce heat, higher speeds for wood. Apply steady, even pressure and allow the bit to cut without excessive force. For metal drilling, use cutting fluid or lubricant to prolong bit life and improve finish; periodically withdraw the bit to clear chips. After use, clean chips from the flutes and store the bits in their case to prevent damage.

Usage recommendations

For best results when drilling metal, use a lubricant and moderate speed; when drilling wood, ensure the workpiece is secured and use higher speeds. Inspect bits for wear or chipping before use and replace any damaged bit to maintain hole quality and safety.