This magnetic probe is designed to be used 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, also known as the Probe, is an innovative accessory that features a magnetic tip specifically designed for use with 4 mm safety test leads. The MP1 Magnet Probe is rated CAT IV 600 V and CAT III 1000 V, which guarantees its safety and suitability for a wide range of electrical applications. It can handle a maximum current of 4 A, making it suitable for both high and low current measurements. The design of the MP1 Magnet Probe enables it to fit into recessed screw holes with a diameter of at least 6 mm. The actual product may have slight color differences, which do not affect functionality. Color: Black Material: Plastic Package Contents: 4 x Magnet Test Probe Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.