Usage Tips:Package includes: 2 x 1000 Amp car battery charger clamps, black + red, 2 x crimp tips, 2 x screws and 2 x nuts. They are useful for connecting components to wires. Pure copper material: The conductors of the alligator clips are made of pure copper for optimal contact and performance, with an insulated handle for convenient use. p > Sturdy: This battery clip is equipped with incredibly strong jaws that will not easily fall off once tightened properly. And have strong spring, need strong grip. Size and fit: the size of each large alligator clip is approx. 15.5cm x 12cm x 3cm, easy to handle. Input: 12V, 24V, 36V; Supports up to: within 1000 Amp current. Wide applications: the battery with portable, lightweight, safe and reliable features. Ideal to be used for home welding tool and electrical testing tool, widely used for various electrical projects, voltage tester, suitable for all car and truck batteries.