FEATURES - These door silencers are designed to reduce noise and absorb shock on metal door frames when the door is opened/closed. Comes in a 12-pack. USAGE - Ideal for both interior and exterior commercial door applications. SPECIFICATIONS - Durable construction and weather resistant. INSTALLATION - Quick and easy installation, just mount into a hole in the door frame. QUALITY YOU CAN TRUST - A global leader in security-related products and services, the Brink's name is synonymous with top quality products to keep you and your belongings safe.