Dormer Pramet A520 4.10 mm HSS TiN ADX STRAIGHT SHANK STUB DRILL DIN 1897 ER Mini Collet Chucks The hollow-ground bore minimizes friction

The hollow-ground bore minimizes friction during high-speed cuts

Stainless Steel & Exotics

Variable index geometry for smoother cuts: Optimizes edge distribution to reduce cutting forces and vibration

and a 2‑flute

or tackling new prototypes

Dormer Pramet A520 4.10 mm HSS TiN ADX STRAIGHT SHANK STUB DRILL DIN 1897 ER Mini Collet Chucks The hollow-ground bore minimizes frictionMeet the Dormer Pramet A520 4. 10 mm HSS TiN ADX straight shank stub drilldesigned for reliable, precise hole making across steel, aluminium and stainless steel. With a straight shank that fits standard chucks and a 4. 10 mm diameter, its built for consistent performance in everyday machining and workshop use. The 130 thinned point aids self centering and reduces push force, while the Titanium Nitride coating extends tool life for tougher drilling