This cover is not formed and therefore suitable for all makes and models laptops that can not be fitted with an original cover.
This does have the disadvantage that there is more movement in the cover itself, and thus become easier to loosen.
This solution is therefore, to be seen as "better something than nothing"
This cover should be paste over the keyboard space.
You need to specify the sizes of the space of the keyboard with an additional 1 cm for the adhesive edge.
Don't forget the extra length, otherwise, the cover does not fit.