Function: 1. Usefulness: Used for precise circuit testing/power supply. It's a great tool for self-connecting a connection with a power supply or a multimeter. 2. Strong Elasticity: There is a spring on the front of the clip, which is stretchable. The clip has strong elasticity and can hold the object firmly. 3. Good Protection Performance: It's better to prevent short circuits caused by touching the feet. 4. Material: Pure copper plate, higher conductivity, welded, built-in spring, can securely hook the test connector. 5. Easy to Install: Long service life, good electrical conductivity, and corrosion resistance. Specification: Item Type: Flat Test Hook Material: ABS, Nickel-plated Brass Purpose: Used for precise circuit testing / power supply Working Frequency: Low frequency. Package List: 20 x Test Hook Note: Prevent placing it in high temperature to avoid damage.