5/16" Cobalt Stubby Threaded Shank Drill Bit Quantity:1 Part Number DWDDL18X63/64

Part Number DWDDL18X63/64

Part Number DWCF206A

Part Number DWDTLCO5/16

Part Number GLBCOX623/64

Part Number ANC5-530-502

5/16" Cobalt Stubby Threaded Shank Drill Bit Quantity:1 Part Number DWDDL18X63/64Product Description Threaded shank drill bits are type D adapter style. They are made from M42 8% cobalt and are manufactured to NAS 965 Type "D" specifications. They have 135 heavy duty split point and surface treated for drilling hard, tough, high tensile strength materials. When drilling low tensile strength materials, the Type "D" cobalt drill will have a significantly greater tool life than the NAS 965 Type B high speed steel adapter drill,