PRO TIP: A single handle is suitable for people who rarely need to open both doors and prefer it to be obvious which door opens first. Dual handles is suitable for people who will open both doors regularly and prefer their doors to be symmetrical in design.
Single handle on main door: Handles on main door only. Second door is opened using shoot-bolts when main door is open.
Handles on both doors: Both doors have handles and cylinder locks with identical keys.