Pistol for the assembling of the back of the frame.
One can fire either rigid tabs for a permanent framing
or flexible tabs, in case the theme should change now and then.
Recommended to be used together with corrugated cardboards. The tabs fired by DOBLO push better the wave-board down, due to their bigger surface (in comparison to the nails fired by other pistols) and thus without ripping the crinkle of the board.