Standard Panic Lock The standard panic lock in the narrow stile version can be used for both single-leaf and double-leaf doors. For single-leaf panic doors with passive leaf, the OneSystem espagnolette can be used. All panic locks from the OneSystem product portfolio are versatile and can be equipped with suitable monitoring functions depending on the requirements. The panic functions B, C, D, E and P offer a wide range of usage possibilities. In combination with the OneSystem panic bars type A and type B, they fulfill the requirements in accordance with EN 1125. The requirements in accordance with EN 179 are fulfilled in combination with various handle Versions.