0.5mm-13.0mm Cobalt Twist Drill Bit Set HSS M42 Jobber Length Metal Drill Bits Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (0.5mm-13.0mm) Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life. 3 Steps Design for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic. Jobber length, the best general purpose length for professionals and DIYers General and Specialized Purpose, for tough materials that normal HSS bits cannot work Cobalt bits make for some of the cleanest holes and the most durable drill bits, the surest bits for long-life and extended working hours on toughest materials Straight Shank will fit in any common drill Includes 10 pieces or 5 pieces or 1 pi.
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