Drill bit set DeWalt DT4944 HSS-E Cobalt 10.5 mm — 5 pieces

DeWalt DT4944 HSS-E Cobalt drill bits, 10.5 mm diameter, pack of 5, are high-speed steel cutting tools alloyed with cobalt for improved hardness and heat resistance. These drill bits are intended for drilling metal and other hard materials where sustained cutting performance and dimensional stability are required. The set supports both hand-held and machine drilling and is supplied as five identical diameter bits to cover repetitive or multiple-hole tasks.

Advantages

The HSS-E cobalt material provides better wear resistance and higher hot hardness than standard high-speed steel, reducing tool wear during prolonged use on hardened steels and stainless materials. The 10.5 mm diameter offers a typical mid-size hole useful in many metalworking applications, while the precision-ground flutes and tip geometry maintain consistent cutting performance and hole quality. Supplied in a pack of five, the set reduces downtime by providing immediate replacements when bits blunt or break.

Suitable for

• Drilling steel, stainless steel and other ferrous metals
• Fabrication and maintenance workshop drilling tasks
• Machine and hand-held drilling operations
• Repeated-production holes where consistent diameter is required

Key specifications

• Material: high-speed steel with cobalt alloy (HSS-E)
• Diameter: 10.5 mm
• Pack quantity: 5 pieces
• Intended use: metalworking and industrial drilling
• Shank style: straight shank suitable for standard chucks

How to use

Secure the workpiece and select an appropriate drill speed for 10.5 mm HSS-E bits and the material being drilled. Clamp the drill bit in a suitable chuck and align perpendicular to the work surface. Use cutting fluid or coolant when drilling stainless steel or hardened materials to reduce heat and extend tool life. Apply steady, moderate feed pressure; back off periodically to clear chips if drilling deep holes. Replace a worn or damaged bit from the pack to maintain hole quality.

Usage recommendations

For best results when drilling stainless steel and other heat-sensitive alloys, use cutting fluid, keep drill speed moderate to low, and allow the bit to cool periodically. Inspect bits for wear and replace with another from the set when cutting performance declines. Store the pack in a dry place to avoid corrosion.