External key cylinders are the most common method of access control. Enforcing a strict key-control policy may not be enough to keep unauthorized individuals out of your facility. In many instances, a screw driver, crowbar, or even a hand gun are the only “key” an intruder needs to gain access to a secure location.

Surelock McGill cylinder guards protect against this kind of attack by encasing the key lock in a proprietary alloy of Stainless Steel. The key-way is protected against drilling and ballistic attack by a hardened rotating disc.