Meet the Dormer Pramet A976 4.30 mm HSS-E High‑Performance Multi‑App Straight Shank Extra Long Drill—designed for reliability and depth when you need a precise hole in challenging materials. This 4.30 mm drill bit blends industrial-grade durability with deep‑hole capability, making it a staple for professional metalworking and meticulous DIY projects.

Why this drill stands out in real-world use:

• 130° self‑centering point reduces wander at start and lowers the push force required, helping you establish a clean, accurate hole from the first pass.
• Bright finish minimizes material adhesion on the cutting edge, keeping the drill cutting freely and extending interval between sharpenings.
• Parabolic flute design engineered for extra‑deep holes in a single pass, boosting productivity and reducing machining steps.
• Premium HSS‑E material (high‑speed steel with enhanced wear resistance) suitable for drilling a range of metals, including steel, aluminium, and stainless steel.
• Extra long length series provides added reach for deep, hard‑to‑access holes—ideal for engine blocks, heavy machinery, and aerospace components where access is limited.
• Straight shank offers broad compatibility with common drill chucks and collets, delivering stable performance and straightforward tool changes.
• DIN 1869 / 1 specification ensures consistent dimensions and interchangeability within professional tool kits.

Ideal for professionals and skilled hobbyists who regularly drill deep or deeply recessed holes in metal, this drill delivers consistent hole quality, improved chip evacuation, and longer tool life under demanding workloads. Use cases include deep blind holes in steel frames, aluminum housings, and stainless fixtures where precision and reach matter most.

Practical tips for optimal results:

• Pair with steady feeds and ample lubrication to preserve edge life, especially in harder metals.
• Leverage the 130° point with a light touch to establish an accurate pilot and reduce drift.
• When drilling stainless steel or other tough alloys, apply cutting fluid to manage heat buildup.
• For very deep holes, periodically retract the bit to clear chips and maintain steady cutting progress.