The Forney 54717 200-Amp Battery Charger Clamps are medium duty copper plated. Our clamps have heavy spring for positive clamping action. Includes positive and negative clamps. Heavy duty construction and easy grip handles. Forney Industries is one of America's longest operating family-owned metal working product companies. Founded in 1932, Forney offers more than 5,000 products for the hardware, automotive, farm and ranch and do-it-yourself markets. If you've got metal working questions, we've got answers. We're committed to your success regardless of location size or needs. 200-Amp Charger Clamps. Claims for warranty must be made within 90 days of the date of purchase. Proof of purchase required. This warranty does not cover any product that has been subject to misuse, neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.