Package Includes: 2 x 1000A Car Battery Charger Clamps, Black + Red, 2 x Crimp Ferrules, 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 insulating handle for convenient use. Sturdy: This battery clip is equipped with incredibly strong jaws that will not easily fall off once properly tightened. And have a strong spring, need a 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: 1000 Amp current. Wide Applications: The battery pack features portable, lightweight, safe, and reliable features. Ideal for home welding tools and electrical testing tools, widely used for various electrical projects, voltage tester, suitable for all car and truck batteries.