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Finjak™ is the simple, tool-free solution for installing and adjusting your surfboard center fin in a sliding fin box. Designed for speed, convenience, and reliability, Finjak removes the need for screwdrivers, loose screws, or fiddly hardware—making fin changes faster both at home and in the car park.
Whether you’re riding a longboard, mid-length, single fin, 2+1, or bonzer-style setup, Finjak locks your center fin firmly in place while allowing easy adjustment along the fin box. It’s ideal for surfers who like to fine-tune fin position for different conditions without carrying tools.
Compact, lightweight, and surf-travel friendly, Finjak is built for everyday use and dependable hold in real-world surf conditions.
Key Features
Tool-free center fin installation
Designed for sliding fin boxes
Fast fin changes and easy adjustment
Secure hold without loose screws
Compact and travel-friendly
Ideal for longboards, mid-lengths, single fins & 2+1 setups
Simple, durable design built for surf use
Performance Benefits
Save time before and after surf sessions
Easily adjust fin position to tune speed, drive, and turning
No lost screws or damaged fin box
Cleaner, simpler fin setup experience
How It Works
Finjak slides into your fin box and locks the center fin securely in position—no screwdriver required. Adjust your fin placement quickly, tighten by hand, and you’re ready to surf.
Recommended Use
Longboards and single-fin surfboards
Mid-lengths and 2+1 fin setups
Surfers who regularly adjust center fin placement
Travel surfers wanting a lightweight, tool-free solution
Product Specifications
Product Type: Tool-free center fin mounting system
Compatibility: Standard sliding fin boxes
Installation: Hand-fitting, no tools required
Use Case: Center fin only
FAQs
What is Finjak used for?
Finjak allows you to install and adjust your surfboard center fin in a sliding fin box without tools.
Does Finjak replace fin screws?
Yes. Finjak removes the need for traditional screws and screwdrivers.
Is Finjak secure while surfing?
Yes. Finjak is designed to hold the center fin firmly in place during normal surf conditions.
What boards is Finjak compatible with?
Finjak works with surfboards that use a standard sliding center fin box.
These genuine Finjaks are manufactured in USA and held as stock ready for immediate dispatch from our Sydney Northern Beaches warehouse.
We include
Free tracked delivery with insurance: Everywhere in Australia on Finjak.
Prompt Australian Dispatch: All items are sent from stock held in Sydney on the same or next business day.
Returns: 30-day, no questions asked returns, for unused full price items.
No More to Pay: No surcharges added at the checkout.
Faster Express Shipping just $10 per order at checkout.