A jack plane is a type of hand plane used in woodworking to shape and smooth wood surfaces. It typically has a flat base and a blade that can be adjusted for depth, allowing the user to remove material efficiently. Jack planes are versatile tools, often used for initial flattening and preparing wood before finer finishing. These planes are usually around 14 to 24 inches long, making them suitable for various tasks. They can be used on both hardwood and softwood, making them a staple in many woodworking shops. Proper technique and maintenance are essential for achieving the best results with a jack plane.