The Global box gutter fixing plate means there are no holes drilled into the gutter to fix it to the wall.
Global box gutters are attached to the wall by the aluminium fixing plate. The plate is screwed to the wall and the box gutter hooks into place. The top of the box gutter locates under the channel on the plate and the weight of the gutter is taken by the lip. This means there are no holes drilled into the gutter unlike other box gutter systems that fix directly onto the wall.
This system is easier to fit and because there are no holes in the gutter makes it watertight.