20 Pieces alligator clips: the alligator clips can be applied in electrical or laboratory electric testing work; They are useful for connecting components to wires Size: the outside diameter of the round plastic shroud is 0.26 inch, the inside diameter is 0.16 inch (where a wire would be inserted); Jaw open maximum width is 15 mm/ 0.59 inch Material: the rust-proof metal alligator probe with the plastic cover is very sturdy and durable; You can use it to repair broken leads on test equipment and chargers or make your own low-voltage jumper leads Easy to open: these heavy-duty clips are easy to open and the spring-loaded jaws grip tightly, strong jaws never fall off once they're clamped down Package content: come with 10 pieces red alligator and 10 pieces black alligator clips, totally 20 pieces; Sturdy and durable clips widely applied in a variety of occasions