On Wall Mount Holder ,with Anti Theft Security Lock and Key, Rotate Design Arbitrary Adjustment,Multi Angle, Horizontal and vertical screen adjustment,Strong and stylish aluminum kiosk, predrilled holes in base for secure Wall or installation. lock keeps tablets secured inside the fixed frame,the locking protects tablet from theft. The clip is made of aluminum, the support adapter is made of iron, and there are a few plastic parts in the adapter. Each accessory package contains set screw and key (the same batch, the key is universal). For most 11-13 inch tablets but not all (Diagonal length 300-370 mm & thickness is less than 10.5 mm). include And Use for iPad 10.5"; iPad 10.9"; iPad 11"; iPad12.9"; iPad 13'' and Galaxy Tab.& Other brand.