RUKO QLS-HSSCo-1/4 HSS-Co Quick-Lock Hex Shank Twist Drill Bit 1/4 inch (6.35 mm)

Drilling into tough metals demands a bit that resists heat and wear. The RUKO QLS-HSSCo-1/4 is a cobalt-alloyed HSS twist drill bit with a 1/4" quick-lock hex shank, built for fast, precise holes in alloyed and unalloyed steel, cast iron, and non-ferrous metals.

Who is it for

This bit suits professionals and serious DIYers who use cordless drills or impact drivers with quick-change chucks. It eliminates the need for a keyed chuck and reduces bit changes to seconds.

Main features

• HSS-Co 5% cobalt alloy for high heat resistance and longer life in tough materials
• 1/4" (6.35 mm) quick-lock hex shank for secure grip and fast tool-free changes
• 135° split point starts on contact and self-centers, no pre-punching needed
• Fully ground flutes for smooth chip evacuation and accurate hole sizing
• Bright uncoated finish for clean cutting and easy inspection

Specifications

• Drill bit type: HSS-Co twist drill bit
• Shank type: Quick-lock hex shank
• Shank size: 1/4" (6.35 mm)
• Drill diameter: 1/4" (6.35 mm)
• Overall length: 100 mm
• Working length: 60 mm
• Point angle: 135°
• Point type: Split point
• Material: HSS-Co 5% (high-speed steel with cobalt)
• Surface finish: Bright (uncoated)
• Manufacturing process: Fully ground
• Standard: DIN 338 cutting geometry
• Max tensile strength: 1100 N/mm²
• Recommended materials: Alloyed/unalloyed steel, cast steel, grey cast iron, malleable cast iron, sintered iron, nickel silver, graphite, non-ferrous metals, plastics
• Application: General purpose metal drilling
• Compatibility: Cordless drills and impact drivers with quick-change chucks

Tips

Use cutting oil on steel to extend bit life. For impact drivers, ensure the quick-lock chuck is fully engaged before drilling. Store in a dry place to prevent corrosion.