Yale P-YSMDC-PC Concealed Door Closer, Fits into the Hinge, Automatic Closure of Doors Up to 50 kg, Electro Brass Finish

As previous reviews have stated, this device is excellent but the fitting is very difficult so be warned. An alternative that I have installed on other doors is the "Reilor C10 Gibcloser Auto Door Closer" which only requires x5 screws and took a few minutes to install so it depends on your DIY skills and requirements.My advice is to fully fit the main cylinder to the door by drilling a 22mm hole (as mentioned by Sam). The recess can be chiselled out by first fitting the device and cutting around the rectangular plate to a depth of around 3mm with a Stanley knife, this creates a clean recess for the plate. Adjust the device for the required tension in the chain by rotating the plate, anti-clockwise reduces the tension. I advise adjusting the tension at this point as you can see the device unscrewing at the other end, for which there is no end stop. As others have found, if you go too far the device will fall apart. It's also worth mentioning that I have a 3 year old so wasn't sure what the lowest tension would be, but I can affirm that it is fine and that the door doesn't slam shut but just draws to.Once the cyclinder is fitted the door can be closed to create an indentation in the door frame for attaching the chain retaining plate later on. Now for the bit that everyone has problems with, you will need something metal that will fit through the links to stop the chain from returning, I just used a small allen key but nail or similar is fine (as others have mentioned); in fact probably better as it won't bend your allen key. I preferred putting something through the chain as oppossed to using the supplied plate as it was less likely to fall out, and believe me, you wouldn't want your fingers near it if it goes!Attach mole grips to the metal bar at the end of the chain, pull it out as far as it can go and insert your nail. I had to hold the fat end of the mole grips and put my knee up against the door in order to apply enough force. As previously stated, this isn't easy and I do lift a few weights.Now all you have to do is cut out the recess in the door frame and attach the retaining plate.Voila!I hope his description helps as it really is worth the effort for this excellent, quiet concealed device!

... than handle another of these things. It works a treat once installed, but have to agree with the other reviews - the flimsy little bit of metal supplied to lock the chain in place while fitting is just not up to the job, it bends out of shape very easily and I had no confidence in it at all. Pulling the chain out in order to create slack to fit was horrendously difficult. I had horrible visions of it snapping shut and trapping my fingers (if not removing one or two) and me then being unable to get it open again. The spring is immensely powerful. You almost feel like you're handling high explosive that could go off without warning. It would actually be very useful if they were supplied with the chain already pulled out in the factory, and a suitably sturdy keeper already in place. All you would have to do then is fit it and then release the chain once in.Also have to agree that the recommended drill size in the instructions is stupidly large - it would indeed give a hole much larger than the end plate. 22mm is much nearer the mark.But now it's in, the door swings shut very well, but without slamming. 4 stars for functionality, I'd give it 1 star for ease of fitting.

This is the only door closer that I could find which is invisible. Once fitted it works perfectly. But thank goodness for P Waldron's review which I had remembered reading when looking at the reviews before buying. His 2" nail method really works, but the difficulty, even then, with fitting is much worse if the door only opens to 90 degrees (e.g. if it is in a corner). Indeed I don't think it is possible to fit if 90 degrees is the maximum the door will open - by removing hooks on the back of the door, I was able to open my door to about 100 degrees and was just able to fit it. Perseverance is the key. I certainly dread having to remove the door again and I certainly do not intend to vary the tension which sounds so simple in the instructions but will entail removing the plate from the door frame.