Humphrey & Stretton Plc are agents for Lahine Engineering Manufacturer's of security doors and allied products including locks, safes and security shutters. Bullet proof doorsets are available to stop and contain attacks by Hand Guns and Rifles from Class GO (9mm Hand Gun with strike velocity of approximately 390m/s) right up to Class R2 (7.62mm NATO Rifle with strike velocity of approximately 815m/s).