Description
Higher quality materials: Heavy-duty twist drill bit made of 5% Cobalt alloyed high speed steel. Bronze steam surface treatment provides a combination of hardness and toughness for wear resistance;Rigid, thick web design strengthens the core to increase flute durability..More professional performance: Self-centring 135-degree split point tip helps to reduce thrust and aids an easier penetration; Tips are professionally hardened and polished for more accurate and fast drilling and faster removal of chips and particles..More comprehensive applications: The cobalt drill bit set can be used effectively on most soft and hard objects, such as stainless steel, cast iron, high temperature alloy, titanium alloy, plastics and woods..Size&Packaging: Including 1/16",5/64",3/32",7/64",1/8",9/64",5/32",11/64",3/16",13/64",7/32",15/64",1/4", Packed in a Metal box with size index for easier storage..Provide long-term after-sales service: If you are not satisfied with our product for any reason, we offer 100% refund or replacement.
