Check the listing for details. Entry Lever Door Lock with Key 304 Stainless Steel Square Deadbolt Lock Black. Color: black, Condition: New. Listed at 35.46 USD. APPLICATION:This interior door lock can be locked from the inside by turning the button on the inside of the door handle, or from the outside using a key. It is widely used in various residential, commercial and institutional doors such as apartment buildings, interior doors, bathrooms, kitchens, bedrooms, study rooms, office buildings, warehouses and other wood door.ADVANTAGES:The lock body is made of aluminum alloy, with surface electroplating technology, which is rust-proof, corrosion-resistant and not easy to fade.The lock tongue is made of thickened solid silent 304 stainless steel material, which is smooth to open and close, effectively reducing the noise generated by opening and closing the door.The thickened solid handle is ergonomic, comfortable to hold, not easy to break, and has good resilience.