Number Of Sticks - 1+2 Pcs CIRCLE Stainless Steel Al Drop for Main Door Security| Door Bolt|Door Latch|Door Handle |Silver| Type-Street Line. An aldrop, also known as a door latch or a door bolt, is a mechanical device that is used to secure a door. Lockable Options: Some stainless steel aldrops come with lockable mechanisms for added security. anti corrosion product that gives you a life long durability.Stainless steel ensures resistance to rust and corrosion,Simple to mount securely on the door frame and adjacent fixed frame,Reliable and sturdy construction for extended use