M35 high speed steel with cobalt, super hard. Smooth surface to reduce friction, sharp blade for fast drilling hole. Wear-resistant with long service time. This...
Milwaukee Step Drill & Cobalt Drill Bit Set Black Oxide 3-Flat Shank (21-Piece). JAM-FREE performance feature a dual-flute design. Up to 2X faster: optimized for...
115 PIECE PREMIUM QUALITY COBALT DRILL BIT SET. THESE ARE NOT COATED DRILL BITS. THE REAL McCOY COBALT DRILL BITS. CUTS CAST IRON-HEAT TREATED STEEL-STAINLESS...
115 PIECE PREMIUM QUALITY COBALT DRILL BIT SET. THESE ARE NOT COATED DRILL BITS. THE REAL McCOY COBALT DRILL BITS. CUTS CAST IRON-HEAT TREATED STEEL-STAINLESS...