FC Hybrid MF Rail Square


The FC Hybrid Rail Square has been made through the need for an accurate reliable rail square.

It milled almost entirely from a single block of aircraft aluminium.

The square also features a unique two-point locking mechanism.

It remains the only square to fit Festool, Mafell, Bosch, Makita, Flex, and Triton guide. This allows owners of different brands to use a single square.

You can buy Bench Dogs and the Systainer Case on the CART page.

In terms of accuracy and quality, we do believe we can claim the FC Hybrid Rail Square leads the way.

Proud to be manufactured in Glasgow, Scotland.

Scotland Flag

Availability: 20 in stock (can be backordered) SKU: FCHRS Category: Tags: ,
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Precision engineered from a single pice of aircraft aluminium. The latest models features all the lastest updates including working with the new Milwaukee rail and the fc900 rail.

Fits Festool, Mafell, Milwaukee,Bosch, Makita, Flex and Triton guide rails.

Accurate to 4 Microns in factory testing.Remove term:

The new MF rail squares are now made to allow you to screw in bespoke BenchDogs to allow you to use on a post formed edge. And to use with a MFT table both at 90° or 45°


Additional information


With Benchdogs, Without Benchdogs

14 reviews for FC Hybrid MF Rail Square

  1. 5 out of 5

    Alan Lloyd

    Bought a mk5 hybrid last summer, first day I had it, it paid for itself with the amount of time it saved whilst I was building a custom 24m continuous desk. Set up is instant, accuracy is dead on. It has become an absolutely indispensable tool which I couldn’t be without now. Since I bought it FC tools has updated the square based on feedback from users, they very kindly offered an update service which I took advantage of, the updated version has a wider support bar for the work piece allowing better cuts on thinner rips which has been very useful.
    The quality of this tool is absolutely first rate, the fit and finish are impeccable and I couldn’t be happier!

  2. 5 out of 5

    Cearbhall O Raghallaigh

    Simply an awesome piece of kit , I’ve s hybrid festool / mafell setup and this has become an invaluable piece of my kit .

    I had one little technical issue n Frank offered to send out new bits , top customer service

  3. 5 out of 5

    Mark Harrison

    Had my mk4 ultra since Aug 2018, fantastic piece of kit. Well engineered and thought out, fast and easy to set up, never had an out of square cut yet, speeds up production time immensely. Yes the square has been tweaked with improvements since I brought mine, but mine works perfectly excellently and meets all my requirements, as well as a few other uses I have discovered along the way. Well worth it can’t recommend it highly enough.

  4. 5 out of 5

    Jack Buchanan

    I bought the mark 6 rail square last year, fanatic bit of kit to add to your rails, highly recommend!!

  5. 5 out of 5

    Mark Crosby {Pearwood Joinery&Construction LTD}

    I originally had another branded square before and I was always disappointed with the way it fixes onto the saw rail. I was looking for something of better quality and more heavy duty. I also wanted a hybrid square because I use two different brand saws rails however there wasn’t any in the market. A friend of mine recommended me to FCtools. I was able to speak to Frank first to explain what I was looking for and I found him very knowledgeable and has a lot experience as he’s still in the trade doing carpentry and joinery. I have my own Joinery business so I wanted a product that my team and myself can use inside the joinery shop and out on site knowing that it would stay accurate indefinitely and also I can take it on and off the rails repeatedly with ease. Frank recommended me the FC Hybrid Rail Square which I have used on both brands of rails and I couldn’t have asked for anything better. I have done research and there is nothing that can match this rail square on the market for quality, precision, reliability, quick and easy to change between rails with ease with the ultra cam lock system. When I had numerous products on the go, I had to order another FC Hybrid Rail Square because of various projects on the go so we needed to order another one. After explaining my situation to Frank, he immediately sent the square to me by the next working day with a special courier. After being in this trade for more than 30 years, no other company has been so prompt and accommodating as Frank. I would just like to say thank you to Frank and FCtools for their products, great Customer service and quality of their products.

  6. 5 out of 5

    Ian (verified owner)

    This is one of the best made tools I have ever bought and is indispensable
    If you are thinking of buying one you won’t be disappointed

    • Frank Cochrane

      thanks mate glad you like it and thanks for your business and your support.

  7. 5 out of 5


    Bought the mk5 about year ago great piece of kit use it every day accurate and robust worth every penny

  8. 5 out of 5

    Frank Gressani (verified owner)

    Hi Frank,
    It’s Frank here. I received the hybrid square today after having spoken to you yesterday. I thank you sincerely for swaying my thoughts into getting the hybrid square owing to have two different guide rails. It’s nice to know that you can still come across someone with a no nonsence approach and a trades person who knows his stuff.

    I know the quality and beauty of these fully machined billets of aluminium were good prior to buying from you (I am from an engineering back ground). It gives me great pleasure in knowing that it is all made within our waters. I await your next endeavours with your indexing pin hole jog.

    Many Regards


  9. 5 out of 5


    Bought this a couple of years ago. I think it was the mark 2.

    Brilliant piece of kit. You get square cuts everytime using this on the rail with plunge saw.

    Saves so much time measuring and marking. Just attach to the rail and place rail on your mark with square tight against the front/ back edge of the workpiece and cut away for a perfect 90°.

    You won’t regret having this addition to your gear.

  10. 5 out of 5

    john watt

    I have had my rail square for almost 3 years and It has become invaluable , fits into my saw’s systainer or my rail bag perfectly , gives perfectly accurate, repeatable cuts each an every time without any doubts , saving me time and making jobs simple in the workshop or on site it is one of my desert island tools.

  11. 5 out of 5

    Vincent Snape (verified owner)

    The quality of the machining is only matched by the quality of the results available with this tool. I have both festool and Bosch rails and it fits either like a glove. My name being printed on it was a nice suprise.the cams used to snug the tool up to the rail are just the perfect balance of leverage. I’m over the moon with it, why I didn’t get one sooner il never know.
    You sir are a genius.

    Vince Snape

    • Frank Cochrane

      hi mate i am happy ur happy my job is done

  12. 5 out of 5

    Phill Clarkson

    An excellent piece of kit, super accurate square cuts every time. Really well thought out and really well made. It’s one of those tools that I couldn’t be without.

  13. 5 out of 5


    Once you’ve used one you’ll regret not buying it sooner, fantastic bit of kit, 100% accurate,
    Saves walking round the sheet to mark the opposite side .
    Add the repetitive rail stop for multiple cuts.
    Brought two mark 5s and then the hybrid.

  14. 5 out of 5


    Only way frank could better the previous rail squares was to make one for multiple rails

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