Commercial Locks | Advantage -Grade 1- Intruder Classroom Lever US26D made by PHG
New lock invented by local principal to stop school intruders
Active Shooter Door Locking Devices
PDQ GT135LED | School Lockdown Lock | Classroom Lockdown
SI-PB5418LN-626 Yale 5400LN Series Double Cylinder Intruder Classroom Security Cylindrical Locks with Pacific Beach Lever Prepped for Schlage IC Core in Satin Chrome - Lock Depot Inc
TownSteel XRF4000 Electronic Security Door Lock programmable RFID Reader School Classroom Intruder Lockdown with Exit Device Trim for ED5500/ED5500F and Trim Only with Key Override Satin Chrome - Amazon.com
Sargent 8241 LNL Classroom Security Intruder Mortise Lock with Deadbolt
Stanley - Classroom Intruder Lever Lockset for 2-1/4″ Thick Doors - 41784976 - MSC Industrial Supply
Grade 1 Heavy Duty Commercial Levers - PDQ XGT Series Classroom Intruder Lever Lock, US26D-Satin Chrome Finish
School Locks: Protect Each Classroom from Intruders - YouTube