Delay egress electromagnetic locks, surface mounted for outswing single or double doors and inswing single doors. Non-handed. The 3101C Series is designed to satisfy egress codes and high security needs at the same time. The next-generation 3101C system integrates totally-redesigned and updated electronics with DynaLock’s proven and forgiving egress-sensing technology. In a typical installation, the door is normally closed and latched by the existing mechanical door hardware and magnetically secured by the 3101C Lock.