This is a nice product and seems to be well built and absolutely fine for the job of storage of garden tools and such like.
A word of warning though. It requires no tools to put together as it simply click-locks into place. However it did not (at least in my case) ship with any form of instructions and although it is 'simple' to put together it is possible (as I found out) to go wrong.
When you assemble this you MUST connect the top and sides together first as they are required to be interconnected to provide strength and there is NO OTHER WAY to make all the pieces fit. Once you have done that then lower the assembled upper parts into the floor where they will click into place. You need to make sure the top and sides remain locked together at the edges - if working alone you can use some duck tape as a temporary measure and remove after assembly. In the absence of instructions I made the mistake of putting the front and sides into the floor only to find that the remaining side would not connect without removing the rest of the sides again. The problem is that the click-lock is very efficient and is not designed to be removed and I had to prise the pieces back out with considerable force using a screwdriver. The box sustained quite a bit of damage as did my fingers. The plastic is tough enough for its job but quite brittle when prising it with metal.
Nevertheless, this is a good purchase and worth the price in my opinion as it cleared the garage out and did the job of keeping garden tools dry.
The EXTERNAL dimensions according to my tape measure are;
width 135 cm
depth 56 cm
height 65 cm
So take away a couple of centimeters all round for the internal measurement.
So, fine for shovels, forks, etc and takes all the smaller garden tools, bin liners, gloves, kneeling stools etc with space to spare. Now had this for twelve months and still water tight and that was despite 8 inches of snow landing on top of it and then melting.