The 619XEL test lead features an insulation-piercing heavy-duty macro-hook adapter to an insulated standard alligator (crocodile) clip. The XEL offers a shrouded banana plug socket for additional test lead connections to test multiple components at the same time acting as a continuous jumper. The needle on the test hook contact blade pierces a wires insulation to make direct and instant contact to the wire conductor. This provides quick and accurate results. A small incision is left upon removal of needle for long-lasting use. Commonly used in applications where reaching the ends of wire is difficult or in delicate environments when stripping and cutting wire is not recommended. These test leads each utilize 18 inches of 18 AWG PVC wire. This is a test lead set of 2 (1 red, 1 black).