Irwin 1 in. X 6 in. L High Speed Steel Drill Bit Straight Shank

Engineered by Irwin, this 1 inch diameter High Speed Steel drill bit is built for serious drilling performance. With an overall length of 6 inches and a 3-inch flute, it delivers both reach and clearance for deep holes, while maintaining precise alignment in a variety of materials. The straight shank, paired with a 1/2 inch shank diameter, ensures broad compatibility with most standard drill chucks, making it a dependable choice for both professional shops and well-equipped DIY setups.

Key specifications

• Drill size / diameter: 1 inch
• Overall length: 6 inches
• Flute length: 3 inches
• Shank diameter: 1/2 inch
• Shank type: Straight shank
• Material: High Speed Steel (HSS)
• Finish: Black Oxide
• Packaging: Tube
• Quantity in package: 1

Why it matters for your projects

The combination of HSS and a black oxide finish means you get a bit that resists heat and corrosion while offering smoother chip flow. This is especially valuable when drilling through metals like steel and cast iron, where heat buildup can dull standard bits quickly. The 3-inch flute length provides efficient chip evacuation, reducing the chance of binding and allowing for cleaner, straighter holes.

Ideal use cases

• Metal fabrication and automotive repair jobs that require larger-diameter holes in steel, aluminum, or brass.
• Workshop projects involving thick metal panels, brackets, or plates where reach and stability are important.
• DIY tasks that need a reliable, long-reach drill bit for deep holes in metal or sturdy plastics.
• General-purpose drilling where a single, versatile bit reduces tool-switching and keeps projects moving.

How this bit stands out from simpler alternatives

• Durable HSS core: Designed to withstand the heat and wear of metal drilling, delivering longer life in demanding tasks.
• Black oxide finish: Reduces friction and improves chip flow, contributing to smoother starts and cleaner holes.
• Long flute with solid reach: The 3-inch flute length enables deeper holes without excessive bit flex or chatter.
• Broad chuck compatibility: The straight shank and 1/2 inch diameter fit a wide range of drills, from professional mortisers to common cordless models.

Practical tips for best results

• Use cutting oil or light lubrication when drilling metal to minimize heat and extend bit life.
• Start with a stable, centered pilot or pilot the hole cautiously to prevent wandering on harder materials.
• Maintain steady pressure and let the bit do the work; avoid forcing the drill, which can cause dulling or breakage.
• For deeper holes, periodically retract the bit to clear chips and reduce binding.
• Store in the included tube to protect the cutting edge between uses and maintain performance.

Whether you’re outfitting a metal shop or tackling a weekend project, this Irwin 1 in. x 6 in. High Speed Steel drill bit with a straight shank delivers the combination of depth, durability, and compatibility you need to complete accurate, clean holes with confidence.