What is keyed alike (KA)? Keyed alike means key coded to the same key number. This option provides "same key" convenience and eliminates the needs for multiple keys where numerious locks and acccess is needed.
What is protect-a-lock (PK)? Protect-a-lock featured door lockset allows the contractor's access to the house during construction, repair or sale until such time that the home owner/occupant takes possession of property. All (PK) featured lockset comes with 2 home owner keys and 1 contractor key per order. Use of the home owner key will permanently lock out the contractor key.
What is master keyed (MK)? In master keyed system, master key can open all locks in the system although each lockset has its own unique key. Master keyed lockset are ideal for permitting supervisory, contractors or emergency access. Use of the home owner key will not lock out the master key.
All master keyed lockset includes 2 home owner keys per lock and 1 master key per order.
When should I use a double cylinder deadbolt? Most of the time, single cylinder deadbolt (thumb turn on the inside) is sufficient if there are no glass panes or windows within 40" of the deadbolt lock. However, if the thumb turn can be reached thru the breaking glass, double cylinder deadbolt is needed.
Please be aware that double cylinder deadbolt can be a fire hazard. Be sure to have a key is quickly accessible to anyone who is inside the house with the deadbolt locked.