Features Purpose: Used for accurate circuit testing or power supply. It is a good tool to connect a connection with a power supply or a multimeter. Nickel Plated Copper Sheet: Nickel plated copper metal sheet with higher conductivity, and soldered. Spring Clip: The front end of the clip has a spring, which can be telescopic. The clip has strong elasticity and can hold the object firmly. Easy To Install: Easy installation, long service life, good electrical conductivity, strong corrosion resistance. Working Frequency: Working frequency is low frequency. Light weight, safe to use, high performance. Specification: Item Type: Flat Test Hook Clips Material: ABS, Nickel Plated Brass Purpose: Used for accurate circuit testing or power supply Package List: 10 x Flat Test Hook Clips (Red) 10 x Flat Test Hook Clips (Black) Note: Prevent it from being placed in high temperature to avoid damage. Package List 10 x Flat Test Hook Clips (Red) 10 x Flat Test Hook Clips (Black)