Silicone circle designThe screws are equipped with black silicone rubber rings. The rubber O-ring can reduce the looseness during surfing, make the surfboard screws more stable and increase the service life of the product.<br> Durable MaterialThe fin screw is made of high-quality stainless steel, which is not easy to rust. You can swim in the sea for a long time without worrying about damage.<br> Easy InstallationThe installation is very simple without using other tools. It can be tightened manually in only two minutes, or the stainless steel fin screws can be easily tightened with a cross screwdriver.<br> Strong compatibilitySuitable for the special screws of the rudder of the surfboard and fit long Board Surfboard center fins, such as long board, sup, single fin and paddleboard.<br> Product PackagePackage include 4 sets surfboard longboard fin screws (34mm)with plastic box and give a small drawstring bag as a gift, enough for your daily use, more convenient spare. Please carefully check the size you need before buying.<br>Note: <br>1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. <br>2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you!<br>About Shipping: <br>1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly.<br>2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.<br>3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 575 hours, wish you a happy shopping!