Description: Made of high quality iron with black nickle coated, high strength, corrosion resistance, anti- shock, corrosion resistance and anti- rust, durable and long service life. Barrel swivel allows for smooth rotation, keeps twisting to a minimum. Quickly connect a variety of fishing hooks, explosion hooks, easy to use for sea rod fishing method, string hook line group. Great for various rigs and leader, high performance in bass fishing, ideal for freshwater and saltwater fishing. Simple design for easy operation, flexible rotation, not easy to wind around the fishing line with high tensile strength. Specification: Material: Iron Nickle Plating Size: Approx. Length: 28mm / 1.10inch 25mm / 0.98inch 23mm / 0.91inch 19mm / 0.75inch 16mm / 0.63inch 14mm / 0.55inch 12mm / 0.47inch Package Includes: 100 Pieces Rolling Barrel Swivel Rings(10 Pack) Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.