Use the Testo 0590 0001 Magnetic Hanging Strap for quick attachment of digital multimeters to metal surfaces, such as heating systems or switching cabinets. Simply thread the suspension system through the rear of the measuring instrument. Because of its powerful magnet, the digital multimeter and 0590 0001 Magnetic Hanging Strap will adhere to the equipment - which means users can have both hands free for making measurements.