Introducing the Dormer Pramet A125 10.00 mm x 310 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328 — a long-reach twist drill built for dependable deep-hole drilling with precision, durability, and versatility.

The 118° conventional point creates a strong, self-centering tip that bites cleanly into metal and remains easy to re-grind when necessary, extending the life of your tool without sacrificing performance.

• Steam oxide finish reduces adhesion between the workpiece and cutting edge, minimizing built-up edge and heat buildup for smoother starts and longer edge life.
• Extra long length, 310 mm provides the reach you need for deep holes, internal drilling, and awkward layouts where standard bits fall short.
• Premium HSS material delivers the right balance of hardness and toughness for drilling a range of metals—steel, aluminum, and stainless steel—with reliable performance.
• Straight shank ensures compatibility with a wide range of chucks and drilling machines, providing stable guidance and predictable runout during extended reach work.
• BS 328 compliance indicates standardized shank and performance expectations, making it a dependable choice for professional workshops and job sites.

This drill is ideal for machinists, fabricators, and maintenance technicians who regularly encounter thick workpieces or internal bores. Use it for automotive fabrication, machinery repair, and metal fabrication projects where a standard 10 mm drill just won’t reach.

Tips for best results: start with a pilot hole slightly smaller than the final diameter, use a suitable cutting fluid or lubricating coolant when drilling steel or stainless steel, apply steady, moderate feed to avoid deflection, and regularly inspect the edge—re-grind when you notice dullness to maintain clean, straight holes.

Designed to pair with standard drill chucks and milling machines, the Dormer Pramet A125 drill is a reliable workhorse in any metalworking shop seeking depth, precision, and long-term durability.