Robust metal structure - enables capacity load of 2000 LBS per pair. Clamping - top metal bars allow to clamp on the sawhorse using trigger clamps (for sawing etc). 2 X 4 recess for lumbers to create jobsite table (with 2 sawhorses). Foldable - quick, compact and ergonomic folding for portability and easy storage. V-groove - to work with pipes and small wood pieces.