GemLock strut with hinge bent
GemLock strut with hinge straight

Hinges and folding struts


Yes you CAN fold stainless tubing

Better access.
Better stowage.
Just better.


Gemini Marine Product’s patented articulated hinge and GemLock folding strut assembly bring simplicity and elegance to your boat.

When opened, a perfectly placed pair of push buttons lock a sleeve in place over the hinge so the strut only folds when you want it to fold.

The design ensures that any strut can also double up as an ocean-rugged grab rail, even when also acting in another capacity. Our step-by-step instructions make it easy – see below.

Use them to:

  • Make spreader bars on bimini tops that eliminate tensioning straps and give your boat a cleaner look and better cockpit access.
  • Install grab rails and pusher bars on dodgers that fold quickly for easy storage.
  • Make folding tables and T-tops, openings in life line rails and stowable jumper seats.

Don’t forget:
Now you can buy kits to add grab rails or convert to a strapless bimini with ease.
Kits contain all the parts you need to install today.

Order now


Join our happy customers

4.9
4.9 out of 5 stars (based on 61 reviews)
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Read reviews or leave yours at the bottom of this page.

Assembled GemLock folding struts


Ready-to-install assembled struts are available in 7/8” and 1” tubing using 316 marine grade stainless steel throughout. Both sizes come in 3′ or 6′ lengths – simply cut to your required length and install on your boat.

GemLock strut made with Gemini Marine Products' articulated hinge.
CAD drawing of strapless bimini setup from exterior
drawing of hinge mechanism

GemLock struts lock in position with a sleeve that slides over the joint made with our articulated hinge and is secured in position with a spring ball on either end. Our struts only fold when you want them to fold, making the entire length of a strut a great grab rail.

Why do you need our folding struts? So you can do things you can’t do any other way.

Articulated hinges


Individual articulated barrel hinges are available in a variety of sizes to meet different needs. Please consult our product specifications for details or call us for advice on which hinge is best for your job.

Good Gear says our hardware gives your boat “a certain elegant attraction“.

Ordering is quick, easy and secure


Just choose the items you need and add them to your cart.

You can even leave your cart to do more shopping then check out any time you’re ready. To return to your cart, click the box at the far right of every page (the cart box is only visible after you have added items to your cart).

You can also buy from any of our distributors if you prefer.

See how it’s done


Strapless bimini conversion guide  download

Review your new
hinges and struts


Read hinge and strut
reviews


Great Product, Excellent service.

August 4, 2022

These are some really great people to deal with, Quick to respond and most helpful. I would not hesitate to recommend them to my friends.

Paul S.

Response from Gemini Marine Products

We’re so happy you’re happy! Thank you for encouraging others to let us make them happy too.

Easy Install, functional hardware

July 28, 2022

I recently purchased 4 Concave fork mounts to install a new Solar panel. The mounts installed easily and are highly functional. The finish installation was quick and professional!

Gregory S.

Response from Gemini Marine Products

We’re so glad you find them useful – being easy to use is our bonus gift for you! All the best.

Solar mount

July 26, 2022

Perfect solution to mount a solar panel on the Bimini.

Edward S.

Response from Gemini Marine Products

Thank you! We do like that word “perfect”…

Exactly as described

July 25, 2022

Able to install both grab rails in less than 30 minutes once I measured and cut the stainless bars to size, which I used a stainless tubing cutter to do. Making an exact measurement was challenging since the tube was too long for the grab rail but I got close enough to produce a secure grab rail.

Peter O.

Response from Gemini Marine Products

Excellent news and congratulations! We’re so glad you like it.

Almost Perfect

July 6, 2022

Great Product, good quality. I just wish the hex screw came in from the other side. It has an embedded hex nut so you can’t change the arrangement. If you’re adding this to an existing Dodger it’s just hard to tighten it without removing the Dodger. That’s the only reason for not giving it a 5 star rating.

Grady H.

Response from Gemini Marine Products

That nut absolutely DOES come out, precisely so you can switch the hex cap screw around. Go on, give it a go. We guess that makes it perfect…?

Solar panel mount

April 16, 2022

Outstanding product. We mounted our solar panels to Bimini frame and also created strapless Bimini and dodger. This is our second order and we are extremely pleased with the products and service

Patricia H.

Response from Gemini Marine Products

It was lovely to see your name come up again – we’re so glad these mounts did the trick.

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