The FM345 is a simple but important security accessory for customers who want to reduce the chance of opener theft or unauthorized removal. On many swing gate actuators, the arm is attached to the gate bracket with a removable clevis pin. Replacing that pin with a keyed security pin lock makes it harder for someone to detach the actuator from the gate without the key. The part is commonly used across older GTO PRO, Linear Pro Access, Mighty Mule, and related swing gate operator families, although exact fitment should still be checked by bracket style and model. Some listings also reference use on Linear Pro slide gate quick chain release points. Because this is a mechanical pin lock, it will not control gate access electronically and it will not replace a gate lock such as FM144 or FM145. It is best viewed as a theft-deterrent add-on for compatible gate opener mounting hardware.
This lock helps protect the operator from being removed at the bracket, but it does not lock the gate leaf closed. For gate-closing security, review the correct automatic gate lock for the operator and gate type.
This is a mechanical security accessory. Do not block emergency access or create a condition where the gate cannot be safely serviced. Use a qualified technician if the manual release or bracket hardware is damaged.
It replaces a removable pin at a compatible gate opener mounting point to help deter theft or unauthorized removal of the operator.
FM345 and FM133 are commonly related search references for the GTO / Linear / Mighty Mule security pin lock family.
No. It locks the opener mounting pin. It does not function like an FM144 automatic gate lock or FM145 pedestrian gate lock.
It is commonly associated with many GTO PRO, Linear Pro Access, Mighty Mule, and related swing gate opener families when the bracket and pin size match.
Some Linear Pro references mention use at slide gate quick chain release points, but this should be verified by the specific operator and release hardware.
