They can be used to connect components to wires. Battery clamp is small, lightweight and easy to use. Battery Clamp. 2x Battery Clamp. [Size & Adaptability] The battery clamp has 2 sizes, including 10.5 x 7.5cm/4.1 x 2.95 in, 15.5 x 10.5cm/6.1 x 4.1 in.
eBay