The product is fine but I used it on a 23" x 37" by 3/4" mdf door, approx 16 to 17 lbs and it failed to keep the door open at all. I found a 250n strut with help from Rockler and it works fine, although its so powerful it is ripping the euro hinges out . Sometimes architects should be made to build the designs they come up to see if it works so us carpenters in the field don't have to go through all the avenues to find it does not.