This is part of a modular building set which is part of my Necromunda collection. The original was made for a mix of 3mm and 4mm materials, and have been converted to be all 3mm. Pictures are of the original.
The Nordgrim tower set consists of a number of corner pieces and floor tiles. For each level you'll need four corner pieces in some combination, along with one floor tile. There is no limit to how tall you can make the tower. I prefer keeping all levels the same width, but you can make the tower narrower as you go up, if you wish. You can glue the pieces together if you want to, but I prefer having them separate so that they can be assembled differently for each game.
This is a 8x8 cm corner piece, which is mostly useful with 16x16 and 20x20 floor tiles, and less useful with 12x12 tiles.
Dimensions are roughly 85x85x95mm (XYZ)
Black = cut
Red = engrave