Features Mental clamps are made of nic-kel-plated iron material, good electrical conductivity. Sleeves are made of high quality PVC, high grade flame retardant, eco-friendly and nontoxic. Comes total 20pcs crocodile clips which can meet you basic need of daily use. Crocodile clips are frequently used in school physics laboratories to quickly and cheaply 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. Description: These crocodile clip are easy for installation and safe for use with the insulation PVC sleeves covered. They can be used for electrical testing, repairing broken clips on test equipment and chargers, making your own low-voltage jump leads. They are also ideal for use in stereo applications or with battery, power terminals or for using on test leads, power supply, test, battery, multimeter test leads. Specifications: Sleeve Material: PVC Clamp Material: Nic-kel-plated iron Function: Electrical Testing Clamp Length(no sleeve): 35mm / 1.37" Sleeve Color: Red(10pcs) & Black(10pcs) Package Includes: 20pcs x Crocodile Clips Package List