Single Cylinder Handle set:
Emtek single cylinder handle sets are locked and unlocked with a key from the exterior and locked and unlocked from the inside of the home with a thumb turn. Single cylinder handle set are the most popular and safest option.
Double Cylinder Handle set:
Emtek double cylinder handle sets have a keyed lock on both sides of the handle set. This means on the exterior and interior of the door you will need a key to lock and unlock the door. Most people will use this locking mechanism if the door is full glass and they are worried about someone easily breaking in and turning the thumb turn. The disadvantage of using a double cylinder handle set is that in the event of an emergency you would have to locate the key to unlock the door and get out of the building. We suggest talking to your local fire department. It is illegal in some cities to have a double cylinder handle set.
Dummy Handle set:
This is the handle set is used when you have a set of double entry doors. The active door you will either use a single or double cylinder handle set and on the non active door you would use a dummy handle. It gives the look of a complete door hardware but without all active parts to make it functioning.