The probe in blue is often a necessary of a test - it provides a galvanic connection between the meter and the tested object. Secure pin probe with Ø 4 mm socket, intended for test leads with plugs and a guard. The probe insulated tip with a length of 4 mm, ensures safe measurements on a various objects. The probe has a guard ring and a grooved surface, providing stable and secure hand grip - also with dielectric gloves.