Spare Windows. The HOYLES K1000 Key Box is a secure and easy-to-use emergency key storage solution designed for access-controlled areas. Typically installed adjacent to emergency exits or secure zones, this unit holds a single key behind a toughened glass window, enabling fast access in emergencies without compromising day-to-day security. Ideal for use in commercial buildings, schools, healthcare facilities, and industrial environments, the K1000 provides peace of mind where safety and compliance are paramount.. Stores all types of keys and access control cards. Red finish. Replacement glass and parts available separately. Holds one key behind a break-glass window