Durability Metal Construction:Made from metal for long last and reliability in various applications. The sturdy build ensures consistent operate in demanding . Versatile Knob Compatibility:Features 15mm/20mm blossom handle design for easy installation with multiple knobs. Ideal for enthusiasts and engineers to upgrade or replace existing equipment components. Precise Output :Generates accurate phase square bands with 90degree phase difference for precise directional control. Ensures reliability clockwise and counterclockwise rotation . Wide Application Ranges : Perfect for precise instrument , electronic device control, and music equipment tuning. Solves compatibility issues between different encoding standards. Package includes: 1pc Ec11 encoding