Topro Reptile Vivarium Terrarium Showcase Display Cabinet Sliding Glass Door Lock + Key Made of stainless steel for windows and doors / cabinets / counter move switch, safe and convenient, with pair of keys Include a metal bar, the locking barrel (mechanism) and 2 keys Keep your valued pet inside its vivarium / terrarium and to keep the un-wanted out Instruction: The bar slides between the panes of glass and is secured in place with a screw, the barrel then slides onto the bar and ratchets into place