Be very careful before ordering this product. The distance between the 'handles' is given, if you look for it. This is the part that straddles the window sill. However window sills are not easy to measure, as you have one side, the window frame in the middle and then the outer sill. It is therefore a question of measuring 'up and over'. It turned out that my sill was a fraction too wide, by only a few centimetres. But that meant that the product did not fit and had to be returned. But, purely on inspection, the product itself appeared to be the 'tool for the job'.