Marks USA - Series 21AC - Ornamental Iron Mortise Lockset - Double Cylinder - Backset: 2-1/2" - Entrance - Satin Chrome - Optional Handing Custom Learning the difference between 8-cut

Learning the difference between 8-cut

The athermalized lens used in Dahua thermal cameras maintains the focus position passively and without power over a wide temperature range

BTB - Shown

IR length 98ft | Starlight Support

Marks USA - Series 21AC - Ornamental Iron Mortise Lockset - Double Cylinder - Backset: 2-1/2" - Entrance - Satin Chrome - Optional Handing Custom Learning the difference between 8-cutMarks 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.