PFA, Inc.'s KOR-LOK™ Side-Action Systems were developed in 1996 to replace standard locking cylinders in core-pull applications. Commonly (yet imprecisely) referred to as locking cylinders, these advanced systems out perform standard locking cylinders and other core pull methods.

Direct Wire Relay Sensors
Sensor Guards & Multiple Sensor Locations Standard. Embedded relay sensors verify “set” and “pull” positions of the core. Most importantly, these switches act as standard dry contact relays making wiring simple and easy. (Use of our former sensor interface has been eliminated.) Simply connect the two sensor wires to the press wires and you're ready to go. Multiple sensor locations are machined in very unit, giving you more selection. As a bonus, we included sensor guards to protect your investment. Simple. Protected. Flexible. That's a KOR-LOK™ Side-Action System.

Multiple Ports Standard
With 5 SAE ports standard, choose rear, side, or combination porting to meet your specific needs. All ports are machined in every unit - you choose the 2 you need.

Smooth High Force Preload
Hardened components and complimentary angles ensure a large mechanical advantage, smooth operation, and excellent core compression / thermal compensation from this enhanced performance design.