Steel personnel doors, modular site offices, storage units, and converted shipping containers face demanding physical conditions. Whether defending valuable tools on a construction site or securing commercial inventory, the locking hardware on metal doors must handle heavy daily usage while offering robust resistance against forced entry.

When servicing or specifying hardware for these doors, Hooply is the industry standard brand. Known for their precise multi-point gearboxes, specialized CEFIRO sashcases, and heavy-duty container hardware, Hooply components allow facilities managers and locksmiths to maintain high security without replacing entire door assemblies.

In this practical guide, we cover how to identify, select, and maintain Hooply container door locks, auxiliary shoot bolts, anti-vandal shutter fittings, and heavy-duty hinges.

Understanding Hooply Door Gearboxes & Sashcases

When a steel door lock begins to drag, stick, or fail to operate, the issue often stems from a worn central mechanism rather than the external handles or multi-point rods. Replacing only the central gearbox or sashcase restores smooth function quickly and cost-effectively.

Hooply produces several central lock cases designed for specific door construction styles:

HOOPLY 33 Ultra Container Door Gearbox: Designed specifically for steel doors, storage containers, and security units, this heavy-duty central unit features a high-security four-deadbolt array and a key-operated latch. With 68mm centres, 225mm screw centres, and a 30mm faceplate, it is an ideal drop-in replacement when the central mechanism wears down.
HOOPLY 31 CEFIRO 4 Point Combat Lock Sashcase: Engineered for high-security steel door setups, the CEFIRO 31 operates via a standard Euro profile cylinder using a double-turn locking action (Locking Method C). Featuring 85mm centres and a 38mm faceplate, it integrates a 4-point locking action within a single lockcase and can be paired with top/bottom rods and side locks.
HOOPLY 95 CEFIRO 3 Point Lock Sashcase: Built with a 28mm faceplate and 85mm centres, the Hooply 95 provides a compact 3-point mortice solution for steel doors where a narrow profile is required.