Glass window opener is plastic material,durable and wearable No Drilling:Easy installation and removal with no drilling or damage.Installs in seconds by placing it on pushing locking switch Sturdy and Durable:As a function,your hands will not even conditions,providing safety for the bathroom,bathtub,and shower room Reusable:the place to install it,you need to wash the the,after drying,the used again light and compact,so you can take it with you when Widely Used:Suitable,mirror,acrylic plate,marble,plate,ceramic tile and other smooth materials