Usage: <br />1 same usage as rolling swivel? stablize hooks to prevent fish escaping. <br />2 more flexibility? can be individually tied to hook? can also pass through fishing line? strengthen overall balance and stability. <br />3 lightweight and wear-resistant gadget? belongs to consumable? you can buy in large quantities? there are a variety of sizes for options. <br />4 different sizes for different fishes<br />Color: Silver Black <br />Material: Metal <br />Model: 2 # <br />Dimensions (L x W): about 20 x 18mm <br />Rod length: about 20mm <br />Ring inner diameter: about 3.40 ＼ 0.05mm <br />Rod inner diameter: about 1.60 ＼ 0.02mm <br />Rod outer diameter: about 2.85 ＼ 0.01mm<br />100 x 2# dropline swivel<br /><img src="http://img6.eachbuyer.com/x9/p100/bt930_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/bt930_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/bt930_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/bt930_4.jpg" />