The LEGO 5420 set, also known as “Strap Element,” doesnt directly correspond to a traditional playset or model kit, as LEGO sets are typically numbered and named. The description you provided suggests a specific part or element rather than a complete set. In the LEGO system, elements like straps, specific bricks, plates, and unique pieces are crucial for builders to add detailed functionality and aesthetic appeal to their creations. These components are often sold as part of kits or through LEGOs Pick-a-Brick service. Without more context or a specific theme (e.g., LEGO City, Technic, Star Wars), its challenging to provide a detailed description. Its possible the number might be misquoted or refers to a part from a particular set. LEGOs vast catalog includes thousands of sets and an even more extensive assortment of individual pieces, each serving a unique purpose in the world of LEGO construction and play. If youre looking for information on a specific LEGO set or theme, please provide more details or check directly with LEGOs official resources for the most accurate and up-to-date information.