Features: This one tool serves two purposes: drilling and tapping.The reverse lock mechanism allows reverse machining. (The chuck itself does not have a built-in reverse function.)Tapping is possible up to M16.This prevents loosening even when the motor is stopped suddenly from high speed rotation.The hook spanner can be used for further tightening, improving safety.It is mainly attached to a drill press or similar device and allows the attachment of drills and taps.