Countersunk Bit Set for Metal, M2 Cobalt Countersunk Bits 5 Pieces, M35 Four Spiral Flute Step Drill Bit Set 1/8"-1/2" （13 Sizes ）,1/4" Hex Shank Drill, Impact Resistant M35HSS Unit Stepper bit, for S

✅【M35 high speed steel with cobalt】: high hardness (HRC67-70) , high red hardness (625 ° C, 4H, HRC63-65) , wear resistance, toughness and bending strength are not lower than ordinary high speed steel, M35 high speed steel is characterized by general cutting with CO, quenching hardness is 1200-1240c. ✅【M35 step drill compatibility 】： step drills can quickly and smoothly drill holes of different diameters, such as stainless steel, aluminum, wood, plastic board (the board must be thinner than the height of the step drill) ✅【M2 HSS Cobalt Layered Drill Bits】M2 Cobalt Coated, each metal countersunk drill bit is made of high quality M2 HSS material, this countersunk drill bit set is excellent in heat, corrosion and rust resistance to reduce friction and run cooler. ✅【Universal Compatibility】Surface black oxide treatment increases corrosion resistance, and the five-blade design helps create a strong connection between the screw and the material.

• ✅【Clear Sizes】Meticulously crafted drills with very high visibility numbers available in very common 1/4", 3/8", 1/2", 5/8" and 3/4" drill sizes.
• ✅【M2 HSS Cobalt Layered Drill Bits】M2 Cobalt Coated, each metal countersunk drill bit is made of high quality M2 HSS material, this countersunk drill bit set is excellent in heat, corrosion and rust resistance to reduce friction and run cooler.
• ✅【13 Sizes :Including】:the bit contains sizes ranging from 1/8” to 1/2”. Common sizes 1/8”, 3/32”, 3/16”, 7/32”, 1/4”, 9/32”, 5/16”, 11/32”, 3/8”, 13/32”, 7/16”, 15/32”, 1/2”, total 9 sizes
• ✅【M35 step drill compatibility 】： step drills can quickly and smoothly drill holes of different diameters, such as stainless steel, aluminum, wood, plastic board (the board must be thinner than the height of the step drill)
• ✅【100 extra-long warranty period】：if you have any questions about the product, please contact us and we will answer you within 12 hours. If the hexagonal handle breaks, refund or replace for 100% .