Perfect for jewelry and trinket boxes, the half-mortise design allows installation of locks into thinner stock. Case is brass with steel mechanism. Case A is 44mm long x 18mm wide x 5mm thick. Case B is 44mm long x 22mm wide by 7mm thick. Case C is 51mm long x 24mm wide by 7.5mm thick.Each lock includes catch plate and one brass key. Screws not included.