State Designed DS22 & DS25 Security Bollards are an excellent perimeter security choice anywhere where K12 or K4 anti-ram protection in required. The DS22 state designed security bollards comply with the toughest U.S. Department of State (DOS) crash-test ratings. Fixed DS22 bollards provide around-the-clock protection against vehicular threats and are engineered to meet up to K12 (M50 equivalent) performance criteria (15,000 lb vehicle at 50 mph).