Attention longboarders and SUP (paddleboarders)! Essential for longboarders: BOX FIN fixing screw bolt #Click here for a list of surf-related products from Mitch SHOP The QUICK SNAP SYSTEM, which allows for one-touch movement of single fins even in the ocean, is now even easier to use! By changing the conventional cylindrical pin to a set screw type, work with hammers, pliers, etc. is no longer necessary. Just tighten with the included hex wrench! The conventional product required one per fin, but the QUICK SNAP SYSTEM II is a set screw type, so you can remove the base and use it on other fins, making it convenient! ● Excellent for adjusting the position of the center fin and easily removing it underwater ● Quick fin lock screw that allows you to instantly attach and detach surfboard fins without tools ● Rust-resistant all-stainless steel material ● Included: Pin / Spring / Base metal fitting / Set screw / Hex wrench Material: Stainless steel Pin length: 36mm Pin diameter: 4mm (Note) Cannot be used for fins with holes smaller than 4mm, so please check the diameter of your fin holes before purchasing. [Accessories] Pin / Spring / Base metal fitting / Set screw / Hex wrench ☆The 2nd to 6th photos are the actual product. Please note that this product is being sold at a bargain price as it does not have packaging. ☆We are selling various surf, snowboard, and outdoor items, so please check out our other listings too(^^)/ Surfboard Longboard Shortboard Funboard Mid-length Alternative SUP Paddleboard Bodyboard Softboard Sponge board Skimboard Surfer's ear Earplugs Ear plugs Deck pad Deck pad Leash cord future FCS Set screw Fin Single fin Center fin Tri-fin Wax Repair Hard case Knit case Deck cover Wetsuit Semi-dry Full suit Jersey full Seagull Spring Long spring Long john Short john Tupper Rash guard Wetsuit Surf pants Innerwear Vaseline Sunscreen Sun oil Poly tank Surfboard stand Wax stand Fin key Screw Screw bolt Fin bolt Fin box