This is a Walthers 933 - 4559 Bridge Shoes and Adapters Assortment Kit in HO scale. It's a great addition for model building, offering a variety of parts for your project.

Using this kit is easy. First, pick the bridge shoes and adapters you need for your model. Just attach them where you want them on your model. Be careful when handling the small parts to avoid losing them. After use, store the kit in a dry place. If there's any dust on the parts, you can gently wipe them with a soft cloth.