Item Type: Flat Test Hook Clips_x000D_ Material: ABS, Nickel Plated Brass_x000D_ Purpose: Used for accurate circuit testing or power supply_x000D_ Working Frequency: Low Frequency 1Purpose: Used for accurate circuit testing or power supply. It is a good tool to connect a connection with a power supply or a multimeter. 2Nickel Plated Copper Sheet: Nickel plated copper metal sheet with higher conductivity, and soldered. 3Spring 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. 4Easy To Install: Easy installation, long service life, good electrical conductivity, strong corrosion resistance. 5Working Frequency: Working frequency is low frequency. Light weight, safe to use, high performance.Prevent it from being placed in high temperature to avoid damage. 10 x FlatTestHookClips (Red) 10 x FlatTestHookClips (Black)