Marks USA - Series 21AC - Ornamental Iron Mortise Lockset - Double Cylinder - Backset: 2-1/2" - Entrance - Bright Brass - Optional Handing Choose Handling:Left Made with the highest quality

Made with the highest quality titanium and other precious materials

Flip Blade Included HU100

W164/W251 04-08 and some others

Aftermarket Emergency Key Included: EKB-MB-005

Marks USA - Series 21AC - Ornamental Iron Mortise Lockset - Double Cylinder - Backset: 2-1/2" - Entrance - Bright Brass - Optional Handing Choose Handling:Left Made with the highest qualityMarks 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.