If you're looking for Blueprint Drawing Hanging Clamps, you've found the right place. Basically speaking, drawing clamps (aka blueprint clamps) are aluminum clamps made out of two pieces of aluminum that clamp a set of construction documents or drawings and hold them vertical, and not flat. The clamps then hang from hangers that are part of a blueprint storage system usually in the form of a rolling blueprint stand or rack, but sometimes can be an enclosed metal cabinet. Either way, the clamps are being held and the drawings are being held by the clamps which best organizes your drawings or blueprints for quick and easy retrieval.