The Dormer Pramet A125 29/64 Inch x 310 mm HSS ST Straight Shank Extra Long Series Drill BS 328 is built for serious metalworking tasks where depth and durability go hand in hand. Designed for long-hole drilling, this bit delivers steady performance from first bite to final exit, even in challenging workpieces.

118-degree conventional point provides a robust starting bite that stays true through the cut. The geometry is purposefully easy to re-sharpen, so you can maintain a sharp edge with less downtime and consistent hole quality over the life of the drill.

Steam oxide finish reduces friction and minimizes workpiece material from welding onto the cutting edge. This helps maintain a clean cut, lowers the risk of built-up edge, and improves chip clearance in a variety of metals.

Extra-long length series means extended reach for deep holes and hard-to-access work areas. With a 310 mm length, you can drill through thick material, brackets, or assemblies without needing multiple drills or repositioning mid-task.

Premium HSS material offers reliable toughness and heat resistance across a broad range of materials, including steel, aluminum, and stainless steel. Whether you’re prototyping, fabricating, or performing maintenance, this drill handles diverse metals with consistent results.

Straight shank design ensures universal compatibility with most drill chucks and machines, delivering stable performance with minimal runout. It’s a practical choice for workshops that require dependable, plug-and-play tooling.

This drill is ideal for professionals and serious hobbyists who demand precision and reach in metalworking projects. Use it for automotive fabrication, machinery maintenance, and fabrication of long structural components where deep-hole accuracy matters. It’s especially effective when you need a single drill that can handle a variety of metals without swapping tools mid-project.

Practical tips: - Use appropriate cutting fluid or lubrication when drilling steel or stainless steel to extend edge life and control heat. - Start with a light, steady feed to establish the hole, then increase speed as needed while monitoring chip formation. - Regularly retract the bit to break chips and prevent clogging, especially when drilling deep holes. - Inspect the point and re-sharpen as required to maintain a clean, square hole entrance and exit.