CISA High Security Sliding Shutter 28550 - 84 Series

CISA 28550 84 Series Sliding Shackle Padlock

The CISA 28550 LIM Steel Sliding Shackle Padlock is a robust high-security padlock designed to provide reliable protection for commercial, industrial, and high-risk security applications. Manufactured by CISA, part of the Allegion Group, this padlock combines a hardened steel body, reinforced sliding shackle mechanism, and a precision pin-tumbler cylinder to deliver strong resistance against cutting, picking, and forced entry.

Featuring a protected sliding shackle design, the padlock minimises exposed metal, significantly reducing vulnerability to bolt cutters and other attack tools. Its heavy-duty construction and corrosion-resistant finish make it suitable for both indoor and outdoor use, providing dependable security in demanding environments.

The CISA 28550 LIM is widely used for securing gates, roller shutters, containers, industrial equipment, warehouses, storage facilities, and perimeter security systems.

Key Features

Sliding Shackle Design for Enhanced Security

Unlike conventional open-shackle padlocks, the CISA 28550 LIM features a sliding shackle mechanism housed within the body of the lock. This design reduces shackle exposure and makes it significantly harder for attackers to cut the shackle using bolt cutters or saws.

Hardened Steel Construction

The padlock body is manufactured from solid hardened steel, providing excellent resistance against physical attack, drilling, and impact damage.

Hardened Sliding Steel Shackle

The internal sliding shackle is constructed from hardened steel with a nickel-plated anti-corrosion coating, offering strong resistance to cutting and sawing while ensuring smooth operation and long-term durability.

Anti-Corrosion Protection

The padlock features a chemical nickel-plated finish designed to resist corrosion and weather damage, making it suitable for outdoor installations and harsh environments.

Re-Keyable Cylinder Mechanism so we can assemble these padlocks keyed alike so multiple locks can be unlocked from a single key. 

Ball Bearing Locking Mechanism

The internal locking system incorporates ball bearing locking technology, increasing resistance to pulling or forced entry attacks.

Construction & Materials

• Solid carbonitrided hardened steel body

• Hardened sliding steel shackle

• Nickel-plated anti-corrosion protective finish

• Precision pin-tumbler cylinder

• Ball-bearing locking mechanism

• Impact-resistant protective components

These features combine to create a high-strength security padlock suitable for demanding security applications.