A fine-grained iron jack plane is a type of hand plane used for smoothing and flattening wood surfaces. It has a flat sole, a blade that extends out of the bottom of the plane, and a wooden or metal handle.
The jack plane is a versatile tool used for removing rough surfaces, flattening uneven boards, and reducing the thickness of lumber.
A jack plane is larger and rougher than a smoothing plane. It is used to remove large amounts of wood and flatten rough surfaces. A smoothing plane, on the other hand, is used for finishing and creating a smooth surface on wood.