High Quality Material: The combination of high-speed steel black and gold oxide finish increases drill bit's corrosion resistance and wear resistance.
Features: Round straight shank,Self-centering design prevents walking,fully ground twist design ensures a drilling performance by decreasing friction,easily for drilling materials includs stainless steel,cast iron,Alloy,Wood and hard plastics.
Efficient Processing:135°split design,automatic centering of the quick cutting point,low pressure,fast penetration,and reduced deviation,twist design allows for smooth removal of debris.
Quality Commitment:If for any reason you are not satisfied with your purchase,please contact us.We provide 30-day money back.100% Satisfaction Guarantee for risk-free shopping!