Use plastic and aluminum as the frames instead of wood. The innovative structure and materials make our puzzle board stronger and more stable than the wooden ones. The materials also help the puzzle board be 30-50% lighter than the wooden ones. 4.5 kg lightweight design is easy and convenient to carry and move. Come with a felt fabric cover mat to protect your works from being messed up by your curious pets. No nails and no splinters ensure safe use. 35×26 inch work surface for up to 1500 piece puzzles. (PLEASE MAKE SURE THE SIZE OF YOUR PUZZLE FITS THIS PUZZLE BOARD). 4 drawers for sorting and storing puzzle pieces.