Alligator (Crocodile) Clip mostly use in experimental Instrument cors in labs such as Variable DC Power Supply as well as in many DIY projects for temporary connections of power supply or any other required connection.
With its Specific Red and Black insulating cover, one can easily manage to make and Break the connections with no polarity conflicts, also avoids the damage or Short circuits..

Mental clamps are made of nickel-plated iron material, good electrical conductivity
Sleeves are made of high quality PVC, high grade flame retardant, eco-friendly and nontoxic
Crocodile clips are frequently used in school physics laboratories to quickly and simple assemble circuits. They are useful for connecting components to wires
Great replacement parts to repair broken leads on test equipment and chargers or make your own low-voltage jump leads