very slight curve on the corners. The cut is generally set deeper than on most other planes as the plane's purpose is to rapidly remove stock rather than to gain a good finish (smoothing planes are used for that). In preparing stock, the jack plane is used after the scrub plane and before the fore plane or jointer plane and the smoothing plane. The woodworker will often start planing across or diagonal to the grain ("traversing") to roughly level the workpiece before planing in the direction of the grain. See also Fore plane References Planes