This is not a kit. This book contains the complete plans and instructions for woodworkers. Plans include easy to understand scale drawings of each individual part, and over 800 step-by-step photographs with detailed instructions. The finished BIG Tower Crane stands 54" tall, has a boom length of 44", and is fully functional utilizing three rings at the base of the model to control all the movement. The Crane boasts 360 degree rotation, 18 inches of carriage travel, a moving counterweight, and full length string cable to lower the hook all the way to the floor, and beyond. This is a challenging but highly rewarding build of a masterpiece. All of S.G. DeVries's models are designed to be nice enough to display but tough enough for play.