Defender Security

Prime-Line's Defender Security products are the world's leading brand of residential home security hardware. Our unique and innovative line provides security for entry doors, windows and sliding patio doors of every type and manufacture. We also support mail box locks, and bit key mortise locks for vintage, interior door systems. Continuous product innovation, new product development, and effective quality control ensure Defender Security products will promote peace of mind for homeowners in today's uncertain world.