Is there ANY way to drill through hardened tool steel?

METRIC SLOT DRILL HSS The best value HSS-Co slot drills in New Zealand

Solid carbide slot drills with a TiAlN coating and they cut through a piece of mild steel like it was butter and left a clean finish

carbide t slot milling cutter Solid carbide slot drill 30° 4 mm, Z=2 Short HA AlTiN+ · 2 cutting edges, short, 30° right-hand cutting · Eccentric relief grinding · Cutting material:

carbide slot drill C R Clarke - ND3 - C R Clarke ND3 Carbide Slot Drill Diameter