A3 Stackable Paper Tray, 3 Tier Desk File Organizer, Desktop Organizer for Office Supplies, File Storage, Letter Organizer /A3 Office File Folder,Home or Office School, White (Landscape-Black-3-Tier)

Product uses press-fit tabs and slots but the fit is so tight and the material so weak that it's easy to damage the pieces trying to get them in--for me, 2 of the 27 slots were damaged during assembly (3 tiers with 9 tab/slots each), so 2 of 3 tiers are damaged. Also, the instructions say to secure with screws after press-fit assembly, but no screws are included. Feels a bit like that part is a CYA when they discovered how press-fit assembly left things insecurely assembled due to damage. The instructions also say you can't return it if you damaged it during assembly, which makes sense but makes this product a trap.