لقمة حفر V بعمق 30° و3 شفرات × قطر 3/8 بوصة – مطلية بـ AstraHP – Bits&Bits (425-375-VG30)

I've been using this bit for engraving fine details on walnut, and the AstraHP coating really does keep it cutting cleanly with noticeably less heat buildup.

I was worried the 3/8″ diameter might be too small for my sign work, but it handles aluminum engraving without chatter. The AstraHP coating is holding up noticeably better than my uncoated bits after a dozen test cuts.

Cut a clean 30-degree groove into a sheet of oak plywood without any tear-out, and the three-flute design kept the edge crisp the whole pass. The AstraHP coating held up nicely on the aluminum test piece too.