Drill Bits DeWalt DT4959 Cobalt HSS 1.5 mm, 2-pack

DeWalt DT4959 cobalt HSS drill bits, 1.5 mm diameter, 2-pack, are high-speed steel twist drills alloyed with cobalt to increase heat resistance and wear life for demanding metalworking tasks. These 1.5 mm bits are designed to produce clean, precise holes in hard materials including stainless steel and other ferrous metals; they are suitable for use with handheld drills and drill presses where small-diameter, accurate drilling is required.

Advantages

The cobalt-enriched HSS composition improves hardness at elevated temperatures, reducing premature dulling during continuous drilling. A 1.5 mm diameter offers precise control for fine holes while the ground twist geometry provides efficient chip evacuation and consistent cutting performance. Supplied as a 2-pack, these bits give a ready spare for repetitive tasks or backup on the jobsite.

Suitable for

• Drilling stainless steel and other hard ferrous metals
• Precision small-hole work in metal fabrication and sheet metal
• Use with handheld drills and drill presses
• Maintenance and repair tasks requiring small-diameter holes

Key specifications

• Material: high-speed steel with cobalt alloy
• Diameter: 1.5 mm
• Pack quantity: 2 pieces
• Tip/geometry: standard twist drill ground for metal cutting
• Intended use: drilling hard metals including stainless steel

How to use

Select an appropriate drilling speed and steady feed rate for 1.5 mm cobalt HSS bits; lower speeds and light pressure are recommended for stainless steel and other hard alloys to limit heat build-up. Secure the workpiece in a vice or clamp, mark the drilling position, and start at a slow speed to establish the hole center. Use cutting fluid or coolant when drilling hard metals to improve tool life and chip evacuation. Back the bit out periodically to clear swarf if drilling deep holes.

Usage recommendations

For best results when drilling stainless steel, use a lubricating cutting fluid, moderate spindle speed, and firm clamping. Replace the bit when wear or chipping reduces hole quality; the 2-pack provides a spare to maintain productivity.