A Deadbolt has a bolt that must be activated by a key or thumb turn. These offer a higher level of security because the latch is not spring activated and therefore cannot be “jimmed”open with an object like a knife.
A single cylinder deadbolt is activated by a key on the exterior side of the door and a thumb turn on the inside of the door.
Satin Stainless Steel Single Cylinder Deadbolt
Polished Brass Single Cylinder Deadbolt
Antique Bronze Single Cylinder Deadbolt
A double cylinder deadbolt is key activated on both sides of the door.
Satin Stainless Steel Double Cylinder Deadbolt
Polished Brass Double Cylinder Deadbolt
Antique Bronze Double Cylinder Deadbolt