Backrest can be laid to be flat as sofabed function, it makes sofa easy to be sofa bed. 

1. KK023# is of heavy duty action,it fit to sofa backrest. 

2. KK023# enjoys 3-stops function: Sitting, TV and sleeping Positions.

3. It works well in poor situation such as glue or dust inside the mechanism.

4. KK023# is mounted to Wing-shaped wood frame or metal frame. 

5. It fits to most of none zero wall styles.