What is .1 drill bit?

A .1 drill bit, also known as a #97 drill bit, is a very small, precision tool used for drilling tiny holes in hard materials, such as metal, plastic, or wood. It has a diameter of 0.1 millimeter or 0.0039 inches. It is often used in electronic and micro-machining applications, as well as jewelry making and other precision work. It requires careful handling and a steady hand to avoid breaking the fragile bit, and it is typically used with a miniature drill press or hand-held rotary tool.