Explore the world of mechanics with this amazing UGEARS Combination Lock wooden model kit, model number 70020. This incredible model kit lets you create a fully functional combination lock without any glue or screws. The kit includes everything you need to assemble the lock, including detailed instructions and pre-cut wooden pieces. With this kit, you can have fun while learning about the mechanics behind a combination lock. The lock works by aligning the numbers on three wheels to open the lock. This kit is perfect for children and adults who love puzzles and want to learn about mechanics in a fun and interactive way. Get your hands on this UGEARS Combination Lock wooden model kit today and discover the joy of building your own functional lock!