Fair-A-Frame Building Slip by Model Shipways guarantees straight bulkheads on any plank on bulkhead ship model kit. Fair-A-Frame guarantees a straight keel with perfectly aligned bulkheads every time! Designed to accommodate virtually any size keel, Fair-A-Frame makes plank-on-bulkhead hull assembly fast and accurate. Fair-A-Frames two parallel guides hold the keel while you work. An adjustable alignment unit straddles the base, ensuring that all bulkheads are square to the false keel. A set of ten metal screws makes the unit fully adjustable in height as well as width. Easy-to-assemble kit includes base, laser cut wooden parts, all necessary hardware, plus illustrated instructions for assembly and use. Base: 24" x 4-1/2".