Fully finger-jointed on every side including the lid — a permanently locked box. No glue needed, but it won't open again once closed. No sign-up, no cost.
The open box has no lid and can be opened and closed freely. The closed box has finger joints on every side including the top, so it locks fully shut and can't be reopened without breaking it — suited to gift boxes or sealed packaging.
No, once assembled the closed box design can't be taken apart without breaking a joint. If you need a reusable, reopenable box, use the Open Box tool instead.
Join the 5 panels (Bottom, Front, Back, Left, Right) first, then close and lock the Top panel last. The top should always go on last.