The United Sports Mfg. Sinker Mold #39 is a specialized tool used in the tackle craft industry for creating fishing sinkers. This mold, designed for United Sports Mfg., allows for the production of high-quality and durable sinkers that are essential for bait fishing. With a focus on precision and craftsmanship, this sinker mold is a valuable tool for any fishing enthusiast looking to create their own custom fishing tackle.