Specifications: Material: Metal & Plastic Color: Black & Red Quantity: 60 pieces Application: Widely applied in electrical or laboratory electric testing work, helpful for connecting components to wires. They also frequently use in school physics laboratories to quickly assemble circuits. Package Contents: 2'' Mini alligator clip: 20pcs 1-3/4'' Alligator clips: 16pcs 2'' Alligator clip: 12pcs 5 Amp charging clip: 8pcs 15 Amp charging clip: 2pcs 30 Amp charging clip: 2pcs