Material: Made of high-quality materials with heat-insulating plastic boots for good performance and lightweight use. Suitable as a replacement for plug hooks in electronic devices or laboratory testing. Easy to install; remove the rear cover to connect multiple measuring devices or DC sources via test cables. Ideal for use with multimeters and other electronic testers to check ICs (integrated circuits) or repair mobile phones and small electronic products. Spring-loaded mini hooks securely hold small components to help prevent short circuits. Can be connected to a monitoring board or other ports. Color: Red, Yellow, Blue, Green, Black. Material: Plastic. Package Contents: 30 electric test hooks (6 of each color). Light and display differences may cause slight color variations between the image and actual item. Measurement error allowance: +/- 1-3 cm.