Slide the 6" long cap onto one end; the other end has a permanent steel cap.

Because of their square shape, these tubes won't roll away. They can be stacked, and the flat surface is easier to label than a round surface.

These tubes have one sealed end and one end that closes with a cap.

Easily grab iron and steel fasteners, small sheets, and other parts from work areas, bins, and hard-to-reach places.