Irwin 12411 1/2" Single Flute High-Speed Steel Metal Countersink

Smooth finishes, zero chatter. The Irwin 12411 is engineered for the professional who demands a surgical finish in metal, hardware, and woodworking. Unlike standard multi-flute bits that can bounce and leave "scalloped" edges, the single-flute design of the 12411 ensures a continuous, clean cut for perfectly seated fasteners every time.

Engineered for Industrial Performance:

• 82° Precision Point: Specifically ground to match the head angle of standard flat-head screws and bolts, ensuring a flush, professional fit.
• Single-Flute Innovation: The single cutting edge effectively clears chips faster and eliminates the vibration (chatter) often found in multi-flute countersinks when working with drill presses or hand drills.
• Premium High-Speed Steel (HSS): Industrial-grade HSS construction provides maximum durability and edge retention, even when working through mild steel, aluminum, and brass.
• 1/4" Round Shank: Designed for a secure fit in standard drill chucks, providing the stability needed for high-torque metalworking applications.
• Versatile Application: While optimized for metal, this bit provides equally clean results in plastics and hardwoods without tearing the grain.

Specifications:

• Part Number: 12411
• Diameter: 1/2"
• Angle: 82 Degrees
• Flute Count: Single Flute
• Material: High-Speed Steel (HSS)

Seat your fasteners with confidence. The Irwin 12411 1/2" Countersink is the essential addition to your metalworking kit, providing the smooth, professional finish that multi-flute bits simply can't match. Upgrade your precision today at edmfast.com.

The "Master Area Command" Bundle 

Precision Drilling. Burr-Free Finishes. Industrial Protection. Pair your Irwin Countersink with these essential machining upgrades.

[→ SHOP ALL DRILLING & TAPPING ACCESSORIES HERE]

• [Irwin 12412 5/8" Single Flute Countersink] – The Heavy-Duty Expansion. Step up to the 5/8" size to ensure you can handle larger lag bolts and industrial fasteners. Having a matched set prevents jobsite delays when fastener sizes change.
• [Milwaukee Cobalt Drill Bit Sets] – The Hard-Metal Solution. Before you countersink, you need a perfect pilot hole. These Cobalt bits are designed to drill through stainless steel and cast iron, perfectly prepping the surface for your Irwin HSS bit.
• [Milwaukee 48-22-8435 PACKOUT™ Compact Organizer] – The Bit Library. Keep your precision countersinks and drill bits from rolling around in your bag. This slim organizer prevents edge-chipping and ensures you can find the right diameter instantly.
• [3M™ SecureFit™ 400 Series Anti-Fog Safety Eyewear] – Clear Sightlines. Metal spirals from countersinking are sharp and unpredictable. These glasses provide high-impact protection and stay fog-free during high-heat drilling sessions.
• [Watson 005 Flextime™ Leather Work Gloves]  – Dryhide™ Water Resistance. Maintain the tactile "feel" required for precision drilling while protecting your skin from hot metal chips and sharp burrs.