The Stäubli 66.9391-05027 is a test lead with a 32A rating, insulated, and features 4mm banana plugs on both ends. It is used for testing electrical currents, checking the Amperage draw, and providing an insulated environment for the safety of the user. It is suitable for a wide range of applications, including automotive maintenance, electrical/electronic repair and inspection, and research & development work. The heavy-duty construction and quality materials, combined with a 4mm banana plug-4mm banana plug design, ensure a robust and reliable connection.