Exit Security Inc SB-01-0036 is a manual door barricade device used for securing single doors during occupancy. It consists of various components such as elevator bolts, square tubing, L bolts, end caps, step nuts, flange nuts, and a caution decal sign. The device is designed for easy installation and can be used to restrict unauthorized access to a room or building. The elevator bolts and square tubing provide a secure hold on the door, while the L bolts and flange nuts help in adjusting the fit of the 1 1/4" bar assembly.