08 Ago RENYU 5Pcs Cobalt Spot Weld Drill Bit Set Kit, Titanium 8 millimeters, BLACK
ADVANCED M35 COBALT HSS WITH MULTI-LAYER COATING Our spot weld drill bit set is forged from professional-grade M35 high-speed steel (HSS) with 5% cobalt content. The upgraded industrial coating combines a TiAlN base layer plus an outer black aluminum nitride (AlNi) layer – significantly boosting...