Meet the Dormer Pramet A125 7/16 Inch x 250 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328 — a purpose-built drill bit that blends precision, reach, and reliability for demanding metalworking tasks. Designed for professional setups and serious DIY projects, this tool is built to deliver clean, accurate holes in deep or hard-to-reach workpieces.

Precision that stays true, from start to finish

The 118° conventional point is engineered to start quickly and carve a self-centering pilot path. That means tighter hole alignment, less wandering, and a smoother cutting experience. The tip is also easy to re-grind, so you can refresh its geometry in-house and extend the tool’s lifespan without sacrificing accuracy.

Stainless, steel, and more — made to cut with confidence

Constructed from premium HSS (High-Speed Steel), this drill bit performs reliably across a spectrum of common materials, including steel, aluminum, and stainless steel. The steam oxide finish further enhances performance by reducing chip adhesion and preventing workpiece material from sticking to the cutting edge, which translates into steadier feeds, better chip evacuation, and improved hole quality.

Extra-long reach for deep, challenging holes

As part of the extra-long series, this drill excels where standard bits falter. It maintains rigidity and cutting efficiency over a longer flute length, enabling you to bore deep holes without switching tools or sacrificing control—for applications like thick profiles, internal channels, or long blind holes where space is limited.

Universal compatibility, engineered for real-world use

With a straight shank, the A125 fits a wide range of drill chucks and machines — from benchtop drills and drill presses to milling setups. The 7/16" diameter paired with a 250 mm length provides a versatile balance between aggressive material removal and precision control, making it a dependable choice for fabrication, maintenance, and repair work in professional shops and advanced home setups. The BS 328 designation signals adherence to established standards, ensuring predictable performance across compatible equipment.

Why this drill stands out

• Robust 118° point: quick starts, reduced wandering, easy re-grind for extended life.
• Steam oxide finish: minimizes sticking, improves chip flow, and supports consistent hole quality.
• Extra-long length: unparalleled reach for deep or hard-to-access holes without tool changes.
• Premium HSS material: versatile drilling across steel, aluminum, and stainless steel.
• Straight shank: broad compatibility with common chucks and machines, simplifying setup.

Whether you’re fabricating parts, performing maintenance on machinery, or tackling a stubborn deep-hole project, the Dormer Pramet A125 drill delivers dependable results with every pass. Plan for precision starts, clean chip evacuation, and long-term tool life — and keep your workshop moving with fewer interruptions and more consistent drilling performance. Add this trusted extra-long drill to your arsenal and experience the difference in reach, rigidity, and hole quality.