The TL900 is Extech’s UL approved test leads with Safe Sense technology that senses the presence of voltage even with a blown fuse for increased user safety. Standard shrouded banana-to-banana plug connectors fit most multimeter input jacks. Dual layer silicone construction with wear indication. Built-in fuse is replaceable. CAT IV-600V, CAT III-1000V, 10A with protective safety cap.