Made with premium quality copper. Good for both freshwater and saltwater fishing. A must-have spinner component for making spinnerbaits or rigs on your own. You can use this to make inline spinners, walleye rigs or Alabama rigs and many others. Perfect hole alignment allows your spinner blades to spin without limit, enhance their flash and noise to attract hungry fishes. Folded design will fit most kinds of blades, and work perfectly on either shafts or braided fishing lines.