Please Note: the square plate(not round) can not removed.You can use one key opening one set of deadbolts and entry lock,For keyed alike Sets, You can use one key opening 12 set of locks at most. [Entry door knob and single cylinder deadbolt set]This door handleset includes entry door knobs and single cylinder deadbolt,it can be locked/unlocked with a key from the outside and turn button from the inside. [Keyed alike door locks]this quantity options is 4Pack,including 8 locks(4 entry locks and 4 deadbolt locks) and 24 keys, that is mean,you can use one key to open 8 locks.please note:if you order 4Pack*2,you can't use one key to open all the 16 locks, you need to use 2 keys(one key to open 8 locks and one key to open the other 8 locks) [Product applicability]This handleset fit all doors 35 to 45 mm ( 1-3/8" to 1-3/4")thickness; it has adjustable lacth,you can use 60mm(2-3/8") or 70mm (2-3/4").it also fit both right and left handled doors. Notice: The latch pl