GDR-SDR Series

Steep spiral angle grooves provide a sharp rake angle for outstanding drilling speed. Aurora coating Aurora coating (TiAICN titanium aluminum carbonitride) is applied to the cobalt vice, which significantly improves surface hardness, heat resistance, abrasion resistance, and adhesion resistance compared to regular TiN coating, resulting in a longer life.
XR thinningThe cutting edge is XR thinning, which firmly bites into the material and enables stable drilling.

Purpose
Iron (2mm)/Stainless steel (1.2mm)/Aluminum (2mm)/Non-ferrous metals/Resin/Wood, etc.