Gatehouse Brass Storm Door Cylinder Lock in the Screen Door & Storm Door Hardware department at Lowes.com
35/35 Brass Cylinder Lock With 5 Brass Keys - Door Lock Cylinder Small 70 Pure Copper Security Door Lock Single Open Cylinder Door Lock - Entry Door S | Fruugo NO
Smart Cylinder Door Lock - Fingerprint - Genie Automata
Keyed Alike Front Door Entry Lever with Double Cylinder Deadbolts,Polished Brass,Exterior Entrance Lever Door Handle,Wave Shape Door Lock Gold,Interior Door Handle Set for Front/Back Gate - Amazon.com
Flat Ball Door Knob Lock with Double Cylinder Deadbolt Keyed Entry Doo - Probrico
Prime-Line Chrome, Storm or Security Door Mortise Double Lock Cylinder, Kwikset K 5061 - The Home Depot
Schlage - Single Cylinder Deadbolts, Door Locks B60
Weslock 471 Single Cylinder Deadbolt - Keyed One Side — weslock
DSC0632DKA4 Door Hardware | Master Lock
60mm Cylinder Lock Copper Dual Open Anti-Theft Door Lock Cylinder with Keys Strong Resistance and Rust-Proof, Suitable for Wooden Doors, Aluminum Doors - Amazon.com
Single VS. Double Cylinder Deadbolts: Which to Choose?
Storefront Door Mortise Lock Cylinder Deadbolts Kit,Door Lock Replacement Parts,Glass Framed Central Door Lock Commercial Door Deadbolts with 3 Keys - Amazon.com