If it says "Chore Boy" with a picture of the little chore boy wearing a read hat, then it is made of pure copper. The knock offs like those found in Walmart which look the same will not have the name chore boy. Look closely and you will see you can turn the pad inside out like a sock. Cut one strand and pull on it and you will have a strand about 12 to 18 inches long. Wrap that around a 38 caliber brush and it is just about right to run down the bore. This method does work well for removing lead without buying some kind of expensive product.That will work! However, there are some Chore Boy clones that are just copper coated steel pads.