1. Hold the clarinet in your left hand with your finger holes covered.
2. Remove the barrel from the upper joint.
3. Place the first half of the ligature on the clarinet over the socket where the barrel goes..
4. Slide the reed onto the reed-receiving end of the barrel.
5. Slide the other half of the ligature over the reed.
6. Tighten the ligature screws using a screwdriver to hold the reed firmly in place.
7. Reattach the barrel to the upper joint.