01.Made of stainless steel A2 (300 Series) body, welded with alloy steel SCM 435 drilling point, by induction hardening.
02.The toughness of material SCM 435 facilitates the drilling operation. It penetrates the heavy-gauge sheet metal quickly, and with #3 point, it could penetrate through 2 layers (1mm+3mm) of A2 sheet metal at constant RPM.
03.Know-how to eliminate the problem of chromium depleted zone. No precipitation of chromium carbide is grounded in fusion zone.