Cell Phone Holder for Classroom This high school middle school classroom must haves cell phone locker, perfectly to hold students cell phones in class. Let students focus more on learning, say goodbye to students playing with their phones in class and create an efficient classroom. Qualified and Sturdy The cellphone locker cabinet is made of aluminum alloy and transparent plexiglass, reliable and strong, not easy to break or deform, thick and sturdy, easy to lock and open the boxes with a key, can be applied for a long time. There are altogether two keys to the safe. Take care of your keys, don't get them to lost. Suitable Size for Classroom Organization This 14.4x7.5x22.8 inch/36.5x19x58cm cell phone storage cabinet is designed with 60 slots and handwritten number tags.