5% cobalt drill bit set (1/16-3/8 in, 21 pcs) heavy-duty twist steel
Cobalt HSS drill bits set for metal, cast iron, plastic and wood. Improves heat and wear resistance with split point design for precision. Customers note high quality and sharpness with good value; some report durability concerns
Highlights
- 5% cobalt for longer life
- 68 HRC hardness
- 3x efficiency and tool life potential
Pros
- 5% cobalt steel for heat and wear resistance
- Wide material compatibility (steel, stainless steel, cast iron, wood, plastic)
- Split point design for precision
- Fully ground bits for sharpness
Cons
- Mixed durability feedback from customers
Best For
Features
- 5% cobalt steel with 68 HRC for increased heat and wear resistance
- Threefold extended life and chip resistance over standard bits
- Three times higher drilling efficiency with more holes per bit
- Split point design for precise starting action on various metals and plastics
