Usage: Used to transport and secure bikes behind the car while driving easily and safely. Attached straps: The clips and straps are attached to the edges of the car's trunk lid or rear tailgate to secure the rack. Sponge parts: These sponge tubes protect the car's body and rear window from scratches or friction with the metal frames. Top bases: The plastic parts with straps at the top are where the bike frame (the top tube of the bike) is placed and secured. Asking 160 Riyals as is in the picture, negotiable.