Mighty Tuff Single Compartment Box is made of a very flexible, durable plastic resistant to cracking and shattering. The hinges on these boxes are metal, increasing the durability of these boxes. Ideal for storing jewellery parts, jewellery findings, clock parts, watch parts. A great organizational tool for all your inventories and spare parts. Dimensions: 4 1/2" x 2 3/4" x 1 1/16"