Containers with Placard Holders are made of Aluminium Alloy Sheet Metal. Popular Engineering Works is an ISO 9001:2008 awarded company that manufactures Containers with Placard Holders. Popular Engineering Works also manufactures oven cages and Drawers. Containers with Placard Holders are natural anodized. The aluminium panels are framed by Aluminium Alloy extrusions. The corners are welded to form a rigid unit. It consists of a handle on the top panel. The hinges are made of rustproof stainless steel material. The latching mechanism consists of a hole for padlock.