Straight Shank M42 DIN338 HSS Drill Bits For Metal With Amber Finished

High-speed steel (HSS) drill bits can drill wood, fiberglass, polyvinyl chloride (PVC) and soft metals such as aluminum.

Cobalt drill bits are extremely hard and dissipate heat quickly. They're mostly used for boring in aluminum and

tough metals such as stainless steel

• Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
• For Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic,and Hard Wood.
• This Cobalt Drill Bit is Typically Capable of Running Three to Five Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
• The Sufficiently Sharp Bit Edge Can Cut the Metal Material into Long Strips of Iron Chips rather than Slowly Grinding through the Material with a Blunt Drill Bit.