Excellent Material: The drill part is made of 4241 high-speed steel, which has higher hardness and good cutting ability, can achieve fast drilling and provide long-term use. The black handle is made of carbon steel, which withstands high working pressure and is not easy to brake. Precise Shanks: It can drill a hole quickly and accurately. And the male thread design can help to discharge waste when drilling, which ensures the success of drilling. Five Different Sizes: Including five sizes of countersunk head screws: 5# 0.2cm, 6# 0.2cm, 8# 0.2cm, 10# 0.2cm, 12# 0.2cm Applications: It is suitable for drills with tension support or hinges. It can be used to drill holes on hardwood and plastic boards. We hope our products can give you a good experience and help you. Within one month of purchasing this product, enjoy a hassle-free return. Please feel free to contact us and we will do our best to help you.