Lag bolts – sometimes called lag screws – are heavy-duty fasteners used to connect larger pieces of lumber. You can recognize them by their impressive size and their distinctive hex-shaped heads. Common sizes are 5/16-inch to 3/8-inch, which is massive when compared with other wood fasteners.
Workshop
How to Make Simple Stackable Sawhorses: Turn Scrap Wood into Sturdy Sawhorses
A good pair of sawhorses is worth their weight in gold. No workshop, construction site, or DIYer should be without at least one pair of simple, stackable sawhorses.