Diablo Metal Demon 29/64 in. X 5.6 in. L Metal Drill Bit 3-Flat Shank

The Diablo Metal Demon 29/64 in x 5.6 in Metal Drill Bit is built for serious metalworking tasks, delivering clean, precise holes in steel, cast iron, aluminum, and other metal substrates. As part of the Metal Demon line from Diablo, this bit pairs toughness with practical design to handle high-torque drilling without slipping or wandering.

• 29/64 in drill diameter
• 5.6 in
• Flute length: 3.7 in
• Shank type: 3-flat shank for secure grip in chucks and quick-change systems
• Material: Metal
• Brand: Diablo (Metal Demon line)
• Packaging: Bulk, 1-piece per package

Why the 3-flat shank matters: the 3-flat design distributes torque more evenly, reducing slip in high-torque applications and helping you maintain straight, accurate holes even when the drill is pushed to the limit. This means less rework, faster projects, and longer bit life in demanding metal-cutting scenarios.

Ideal use cases include fabrication and repair work where deep, reliable holes are required. The 5.6 in overall length gives you enough reach for thicker materials, while the 3.7 in flute length keeps the bit balanced and capable of removing metal efficiently without overheating.

Pro tips for best results:

• Match your drill speed to the material and bit size; start with a moderate rpm and adjust as needed to minimize heat buildup.
• Use a cutting fluid or light lubricant to extend bit life and improve chip evacuation when drilling steel or cast iron.
• Secure the workpiece with clamps and start with a center punch to prevent wandering on harder metals.
• Ensure the chuck securely grips the 3-flat shank to maximize torque transfer and reduce slippage.

With its robust metal construction and purpose-built 3-flat shank, the Diablo Metal Demon 29/64 in x 5.6 in drill bit is a dependable choice for professionals and serious hobbyists who demand consistent performance, deep reach, and reliable hole quality in metalworking projects.