Cow Stop is a one-way, spring loaded gate that mounts on any type of fencing of a crowding alley. Allows cattle to pass by but not back up. The long 24" arm keeps animals from getting poked in the side and getting partially caught up. L-shaped lever locks arm into open position.
You use lag bolts. Lag bolts are not included as everyone's application is different. There are pre-drilled holes in the bracket that mounts to the alley. There is also a pin on there that you can use to lock it open.