These welding-free hook test clips can be used to connect your breakout boards. There are 5 colors to help you conveniently test and replace the circuit. The test wire is made of quality silicone material that extends the service life of products. This test hook is well suitable for low current tests, photoelectric or DIY projects, lab electrical tests, applications, electrical equipment, circuit board, etc. There are 10 wires of different colors in one package.