Marks USA - Series 9215AC - Ornamental Iron Mortise Lockset - Single Cylinder - Backset: 2-1/2" - Entrance - Bright Brass - LHR Knobsets door or frame Fail Safe

door or frame Fail Safe / Fail Secure Fail Secure

available separately or thumbturn such as the 4066 Thumbturn

He has watched the evolution of these key systems over the years

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Marks USA - Series 9215AC - Ornamental Iron Mortise Lockset - Single Cylinder - Backset: 2-1/2" - Entrance - Bright Brass - LHR Knobsets door or frame Fail SafeMarks 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.