The tail drill (or a concluded drill in English Taper Shank Drill Bit) is used where the need to install direct drill inside the spindle or the device without the need for triple -three. This type of drill is usually in industrial machines like: Column drill (column or radial) Lash machine Milling machine Heavy or industrial desktop drills Used. Benefits of Kunic Drill: 1. Strong and firm installation: Because the end of the drill is designed as a conical, it is placed in the cone hole without a jar. 2. Better Transfer of Power: The more contact between the drill and the spindle will make the torque better transfer. 3. For larger diameters: It is usually used for drills over 1 to 2 mm in diameter, as ordinary triangles do not provide enough torque for these drills.