These are the same bins included with the Allit large professional modular storage cases. In addition to being useful for customizing the layout of a storage case, they can also be used independently for organizing a cluttered drawer. They are particularly convenient when used in combination with an Allit storage case; their modular design lets you quickly swap out the contents of the case, so you take only what you need for a job. Each bin is 62mm (2 7/16") deep. Interior dimensions given. Made in Germany.