Kinnaird Evolution Carbon Fibre Drone Reeds reimagine the original design to produce a bright and resonant tenor sound without being buzzy. The very popular Kinnaird bass drone reed has been improved to deliver slightly more power than its predecessor. A metal set screw and Allen key allow for easy adjustment of tuning height. The reed seats are Glass Fibre for strength. Pitch can be adjusted with the tuning screw and O-ring bridle to control airflow. The reeds have a curved Carbon Fibre moulded, cane-like tongue. Kinnaird Evolution drone reeds offer outstanding air efficiency, are easy to set up and offer excellent moisture resistance.