The Ingersoll Rand 313A-42-4 Sander Vane 4-Pack maintain consistent power and smooth operation in compatible air sanders. These vanes work by creating the internal airflow and rotational force needed for the sander’s motor to effectively slide within the rotor slots to generate the necessary pressure and motion. As they wear over time, replacing them restores proper performance, reduc... https://www.wholetoolbox.com/ingersoll-rand-313a-42-4-sander-vane-4-pack