Brand Zinging life Material Acrylic Product Dimensions 7"D x 20.5"W x 19.7"H Mounting Type Wall Mount Door Style Flat Panel About this item MATERIAL:Made by clear acrylic,inside box can be seen easiler; Individual Locks: Has 20pcs individual locks,each lock has two keys and two number signs (two number signs for each lock ,more easier to use,one for leader,one for students or workers) .Total is 40 keys,40 number signs. On desk or on wall;It is self-standing on a desk; also can be mounted on wall; SIZE :20.5?X 7?X 16.5?(Each small box?size :3.9?x7?x 3.9?),can fit most cell phone,can also put keys etc. Widely Use: put at school classrooms for students;put at office,factory,restaurants for employees etc.