Dormer Pramet A321 4.10 mm HSS ST/BR TRI-FLAT SHANK INTERMEDIATE LENGTH MECHANICS DRILL

The Dormer Pramet A321 4.10 mm HSS ST/BR Tri-Flat Shank Intermediate Length Mechanics Drill is a durable high-speed steel drill built for reliability and precision in everyday workshop tasks. With a 4.10 mm diameter, this drill delivers accurate holes in a range of steels and non-ferrous metals. The tri-flat shank provides a secure grip in drill chucks, minimizing slippage under load, while the intermediate length offers extra rigidity and reach for general-purpose drilling.

• Secure tri-flat shank for reliable chuck grip: The tri-flat geometry locks into chucks to prevent slippage and ensures consistent torque transfer, even under tough drilling conditions.
• 4.10 mm HSS drill with polished finish: Made from high-speed steel for durability; polished finish reduces friction and improves chip evacuation, promoting smoother cutting and longer tip life across steel and non‑ferrous metals.
• Intermediate length for optimal rigidity and reach: Balances stiffness with practical reach for general-purpose drilling, reducing deflection and delivering cleaner holes in a variety of setups.

Designed for dependable performance, this drill helps you complete holes faster with fewer passes, less tool wear, and fewer interruptions. The combination of a secure shank, efficient cutting geometry, and a versatile length makes it a reliable choice for engineers, machinists, and hobbyists alike—whether you're building prototypes, repairing equipment, or performing routine maintenance. Trustworthy construction and consistent results translate to improved workflow, higher first-pass accuracy, and shorter cycle times in daily drilling tasks.