Account should be taken of the protection features and safety ratings of the test meter itself when combined with high specification test leads. Multimeter Test Leads. Replacement test leads suited to RS Pro, ISO-TECH and most other digital multimeters. Fitted with right-angled 4 mm shrouded plugs and supplied with probe tip insulators to prevent accidental short circuits. The multimeter test lead kit comes with the added benefit of a pair of crocodile clips for easy application. The probes are designed to meet BS EN 61010-1 safety standards Cat III. Features and Benefits. Meet CAT III Safety Standards Probe tip insulators Current rating 10 A Optional crocodile clip applicator