Great for outdoor fishing. <br><br><strong>Features:</strong> <br>Simple design for easy operation. <br>Use to connect and fasten fishing line with hook position， prevent hook slipping and line breakage. <br>With white box， easy to carry. <br>Fit for outdoor fishing. <br><br><strong>Specifications:</strong> <br>Material: Stainless Steel <br>Color: Black <br>Size: 10#， 12#(optional) <br>Package Size: 5 * 3 * 1cm / 1.97 * 1.18 * 0.39in <br>Package Weight: 7g / 0.24oz <br><br><strong>Package List:</strong> <br>20 * Rolling Swivels <br><br><strong>How to use</strong>: link line to the hook ring， and then pull down the black rubber sleeve.