This magnetic probe is compatible with a wide range of instruments, including 190 Series, 3540 FC, 1736 and 1738, 434-II and 435-II, 437 Series, and 438-II. The MP1 Magnet Probe is an accessory featuring a magnetic tip designed for use with 4 mm safety test leads. It is rated CAT IV 600 V and CAT III 1000 V, ensuring safety and suitability for various electrical applications. The probe can handle a maximum current of 4 A, making it suitable for both high and low current measurements. Its design allows it to fit into recessed screw holes with a diameter of at least 6 mm. Color: Black Material: Plastic Package Contents: 4 x Magnet Test Probe Note: The actual product may vary slightly in color, which does not affect functionality. Light reflection and display differences may cause the item's color in images to differ slightly from the real item. Measurement may vary by +/- 1-3 cm.