Model Number:BigKing2nmu4xhef8 Material:Aluminum Item Weight:92 g Aluminum Window Gate Security Pull Ring Spring Bounce Door Bolt, compatible for window,doorgate etc.keep your properties safety. Strong and SturdyZinc alloy automatic door bolt, spring loaded, pull ring bounce, easy installation. High QualityHigh quality door bolt provides enhanced security for doors, gates and windows. Good SubstituteWonderful replacement for replacing your old or damaged one. Good SubstituteCompatible for window,doorgate etc. keep your properties safe. After-sales ServiceWe promise to answer your questions within 24 hours. Strong and SturdyZinc alloy automatic door bolt, spring loaded, pull ring bounce, easy installation. High QualityHigh quality door bolt provides enhanced security for doors, gates and windows. Good SubstituteWonderful replacement for replacing your old or damaged one. Good SubstituteCompatible for window,doorgate etc. keep your properties safe. After-sales Service We promise to answer your questions within 24 hours.