In the past few years, we have covered plenty of cool unique chessboards and chess sets here. This Scrap Metal Chessboard by Stevieacciaio is also worth a look. It is a handmade chessboard made with screws and bolts. The board is done by overheating the steel, with no paint applied.
This chessboard measures 31 x 31cm, weighing 3kg. You can find it on Etsy.