Premier Lock® is an industry leader in providing functional, secure, and smart locksmith products for residential and commercial purposes. All cylinders used in Premier Lock® products are made of solid brass to ensure an extended lifetime and protection against corrosion. Secure your doorway with this product with a deep, 2-3/4" back set. Each mortise lock is precision engineered and cut for maximum performance with a 2-3/4” backset. This lock is rated high for security.