Edge sends signal to stop and/or reverse operation when sensing obstructions

Two hinges are needed for most gates

LiftMaster Heavy Duty Roller Cage Bearing Hinge - Flat to Gate

correctional facilities

this will make it harder for people to climb

3' Yellow Surface Mount Non-Motorized Traffic Spikes; Galvanized Ultra Latch Edge sends signal to stopCan be used in all commercial and residential applications. Easy to install on asphalt and concrete surfaces. Also acts as a speed bump. Manual Traffic Spikes Directional Control Directional Traffic Control, also serves as speed bump. Rugged, durable design in Standard Duty and Heavy Duty construction. Top Down design make maintenance easy and fast. Unique curved tooth, fishhook design. Durable spring loaded teeth with counter balanced back up. Zinc