CIRCLE MILD STEEL Al Drop for Main Door Security| Door Bolt|Door Latch|Door Handle |Brown| 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 Mild steel aldrops come with lockable mechanisms for added security. The hardness of this product gives you a life long durability.Simple to mount securely on the door frame and adjacent fixed frame,Reliable and sturdy construction for extended use Number Of Sticks - 1+2 Pcs CIRCLE MILD STEEL Al Drop for Main Door Security| Door Bolt|Door Latch|Door Handle |Brown| 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 Mild steel aldrops come with lockable mechanisms for added security. The hardness of this product gives you a life long durability.Simple to mount securely on the door frame and adjacent fixed frame,Reliable and sturdy construction for extended use