While installing a master cylinder might not be an especially daunting task, bleeding it once installed is another story. Because of this, Wilwood is including its master cylinder bench bleeder with the purchase of any tandem master cylinder. The bench bleeder comes with multiple nylon fittings for the master cylinder ports. It also has connections for lines leading back into the master cylinder. Using this bleeder saves hassle and cleanup, and its free (once you purchase Wilwood's master cylinder).