Sturdy car seat hanger hook:Made of high quality PP material,strong,durable and environmentally friendly.They will not crack or break easily.Each headrest bag hook can hold up to 44lbs/20kg.,Well organizer:The car seat back hooks are perfect for hanging groceries, clothes, umbrella, handbags, water bottles, baby toys and much more,avoid your handbag and food bag from driving Fall off the seat ,it also make your car tidy.,Easy to Install:With the side opening design,the car handbag hooks are easy to install without any tools.Just hang the hooks around the headrest poles.But the diameter of headrest poles should be 0.4" to 0.6 ",Universal Use:The car water bottle hooks are fits for every Car, SUV, Van, Truck.converts your car's headrest into a convenient storage space to hang car to hang purse ,grocery bags, clothes, handbags and so on.