The Dormer Pramet A125 7.50 mm x 250 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328 is built for serious deep-hole work without compromising control or accuracy. This 7.5 mm diameter drill bit combines a robust 118° conventional point with a purposefully long reach, giving you fast starts, minimal wandering, and the ability to drill into recessed or hard-to-reach areas with confidence.

• 118-degree conventional point – A strong, self-centering point that bites quickly and resists walking. It’s also easy to re-sharpen, extending the life of the bit in busy workshop environments.
• Steam oxide finish – Reduces friction and prevents material from sticking to the cutting edge, helping you maintain clean holes and smoother chip evacuation during prolonged drilling sessions.
• Extra-long 250 mm length – Specifically designed for drilling very deep holes or reaching into confined spaces where standard-length bits won’t suffice. Ideal for fabricating brackets, machine assemblies, and automotive components with internal features.
• Premium HSS material – High-speed steel offers a reliable balance of toughness and heat resistance, making it capable of drilling through steel, aluminum, and stainless steel with consistent performance.
• Straight shank, BS 328 compatibility – The straightforward straight shank fits a wide range of drill chucks and machines, from benchtop drills to CNC setups, ensuring broad compatibility in professional shops.

Practical use cases

• Deep-hole drilling in automotive manifolds, engine blocks, or frame components where space is limited but precision is non-negotiable.
• Fabrication projects requiring long-reach holes in brackets, gussets, or tubular assemblies.
• Maintenance and repair tasks where you need to drill clean, accurate holes in thick metal sections without frequent bit changes.

Why this drill stands out – The combination of an easy-to-sharpen 118° point, steam oxide finish for reduced sticking and smoother chips, and a true extra-long body yields dependable performance where standard bits struggle. It’s not just about drilling; it’s about finishing jobs faster with fewer tool changes and less effort.

Tips for best results: use appropriate drilling speed and feed for the material (lower speeds for steel and stainless; moderate speeds for aluminum), apply a light cutting fluid to extend edge life, and ensure steady, perpendicular pressure to maintain hole quality and prevent bit deflection.