Thank you for viewing! ⭐︎ Free Shipping ⭐︎ Anonymous Shipping This is a quick fin lock screw that is very convenient for attaching and detaching single fins on longboards, mid-lengths, etc. ◼︎ You can easily set it by simply pushing and turning it while it is set on the fin, shortening the time from arriving at the point to entering the water! ◼︎ No tools are required for attaching and detaching, so you can smoothly move the fin with one touch even in the ocean! 【Set Contents】 ・Pin ・Spring ・Base metal fitting ・Set screw ・Hex wrench Above x1 set 【Specifications】 ・Pin length: 36mm ・Pin diameter: 4.2mm ＊ Fins with a diameter of 4.2mm or less will require processing. ＊ Made of stainless steel, so it is resistant to rust! Surfing Surfboard Shortboard Longboard Mid-length SUP Marine sports Outdoor Surf trip Surf camp Single fin Fin screw Quick fin screw Quick snap screw