From the manufacturer:
Marks USA has been a primary manufacturer of Ornamental Iron Storm Door locks for many years. During that time, many innovative improvements were developed to increase the reliability and ease of installation. Innovations includes the "Uni-Lock" model with single screw assembly, elimination of threaded swivel spindles in favor of the more secure thru-bolted design, helper springs in lever-rose sets, and steel hubs for greater endurance.
Product description:
Complete mortise lock set designed to fit into 1" OD steel mortise lock box commonly found on ornamental iron steel security storm door. Set includes blue Marks USA lock body, two threaded mortise lock cylinders (keyed alike), inside and outside handles, and set of mounting screws.
Removal and installation videos:
REMOVAL: https://youtu.be/sqrtROc2sFo?si=XbO0FORejfuvSuSH
INSTALLATION: https://youtu.be/z7SFoatkLyg?si=SN6qksljwdQTcx4l
Options:
Choose from four different hardware finishes and two different key types. Custom key matching also available at time of order. Customer to provide key prior to shipping.
Genuine Marks USA Mortise Lock Set 9215 Series Lever Handles ( 9A / 90A )
30-day return policy. Product must include all original packaging and parts in resellable condition with no physical damage.