A countersink bit is a specialized drill bit designed to create a conical hole in a material, allowing the head of a screw or bolt to sit flush with or below the surface. This tool is commonly used in woodworking and metalworking to ensure a smooth finish and prevent snagging on protruding fasteners. Countersink bits come in various sizes and angles, typically ranging from 60 to 90 degrees, depending on the type of screw being used. They can be used with power drills or hand tools, making them versatile for both professional and DIY projects. Proper use of a countersink bit enhances the overall appearance and functionality of the finished product.