Features 1、Mental clamps are made of nickel-plated iron material, good electrical conductivity 2、Sleeves are made of high quality PVC, high grade flame retardant, eco-friendly and nontoxic 3、Comes total 20pcs crocodile clips which can meet you basic need of daily use 4、Crocodile clips are frequently used in school physics laboratories to quickly and cheaply assemble circuits. They are useful for connecting components to wires 5、Great replacement parts to repair broken leads on test equipment and chargers or make your own low-voltage jump leads Specification Description: Features: 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. 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. Specifications: Sleeve Material: PVC Clamp Material: Nickel-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