Product Name: Quick Change Shank Twist Drill 6542 Hex Shank Twist Drill Set Metal Stainless Steel Open Hole Twist Drill
Product Material: black hexagonal handle part of the carbon steel, white drill part of the 6542 high-speed steel (M2)
Product Features: Hexagonal shank drill convenient clamping, high concentricity, high hardness 6542 drill, long life, good drilling effect.
White drill part of the useful life of the time, you can also replace the new drill to the black hexagonal handle