Astro Tools 401K3 THOR Air Hammer Bit Set - 3-Piece, .401 Shank, Heavy Duty

Overview

The Astro Tools 401K3 THOR air hammer bit set introduces a new standard in bit performance. Built with Astro THOR hammer alloy, these bits are engineered for higher hardness while maintaining toughness to resist chips and cracks when used with the most powerful air hammers. The result is a durable bit that can handle demanding metalworking tasks without dulling quickly.

Designed to balance strength with practicality, the 401K3 includes three bits with a .401 inch shank and a 1 inch diameter, offered in 4 inch, 7 inch, and 12 inch lengths. This range gives you options for tight spots, deeper access, or leverage for material shaping, so you can tailor your approach to the job at hand.

What’s in the kit

• Three hammering bits with .401 inch shank and 1 inch cutting diameter
• Lengths of 4 inch, 7 inch, and 12 inch to cover short reach and long reach applications
• Each bit is crafted from the THOR alloy for improved wear resistance

Why it stands out

• Harder surface plus high toughness reduces chips and cracks under heavy use
• Proprietary THOR alloy specifically developed for high power air hammer work
• Versatile three piece set provides options for different access and leverage needs

Real world tasks may vary based on tool setup and material. The 401K3 is designed to deliver reliable performance across a range of metalworking applications, offering possibilities rather than guarantees. When matched with compatible air hammers, these bits can contribute to efficient workflow and thoughtful tool selection.

Durability and longevity

Durability matters in high speed metalwork. The THOR alloy emphasizes hardness to resist wear while maintaining resilience. The result is less frequent early replacements and more consistent performance over time.

• Hardness and toughness balance reduces fatigue on the bit
• Less risk of chipping and cracking in tough materials
• Longer service life under demanding conditions

Tips for best results

• Use with compatible .401 inch shank air hammers at appropriate pressure
• Choose 4 inch for tight spaces or 12 inch for deep reach
• Inspect bits for wear and replace as needed

Whether you are replacing worn bits or tackling challenging metal shaping tasks, the 401K3 offers versatility and reliability without promising guaranteed outcomes. Consider these benefits as possibilities depending on tool setup and application.