Egg weights are used for a variety of fishing applications. These sinkers are often used in lakes and rivers. This style of sinker allows the line to slip through while the fish go after the bait. MADE IN THE USA: all sinkers are hand-poured lead! We ensure that you'll be receiving quality sinkers. Egg weights are used for a variety of fishing applications. These sinkers are often used in lakes and rivers. This style of sinker allows the line to slip through while the fish go after the bait.