jiuwu 13pcs tungsten steel cemented carbide twist Drill bits

Material: YG Cemented Carbide + Chrome Vanadium Steel High toughness, abrasion resistance, high-speed cutting for the high hardness. In the process of opening holes to continue to add water for cooling. Size: 3mm 4mm 5mm 6mm 7mm 8mm 9mm 10mm 11mm 12mm 13.5mm 14mm 15mm. Ideal for drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel. * Material: YG Cemented Carbide + Chrome Vanadium Steel * Drills clean, accurate holes in these thin materials: sheet metal, ducts, steel, copper, brass, aluminum, plastic, wood, veneers, vinyl siding, plasterboard, PVC, stainless steel and cast iron. * Ideal for drilling in tough metal, including heavy-duty abrasive alloy and hardened steel. * In the process of opening holes to continue to add water for cooling. * Size: 3mm 4mm 5mm 6mm 7mm 8mm 9mm 10mm 11mm 12mm 13.5mm 14mm 15mm. * Twist drill bits for fine-detail drilling with the cutting power of diamond * Package include: * 13pcs Tungsten Steel Cemented Carbide Twist Drill Bit

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