Video - HydraWedge SM50 Anti-Ram Crash Barrier: 3-sec open or close; 1 sec EFO. June 11, 2020 16:18 Updated Related articles Video - HydraWedge SM50 Crash Test HydraWedge SM50 & HydraSupply XL Installation Instructions HydraWedge SM50 Parts Diagrams HydraWedge SM50 Spec Sheet Video - HySecurity WedgeSmart DC