Features Master Lock's exclusive bump stop advanced cylinder technology to protect against bump attacks</br>Fits only 2-3/4-inch openings</br>Meets ANSI/BHMA A156.5 standards for deadbolts</br>UL listed?? meets UL 3 hours fire rating</br>Cylindrical lock housing</br></br>Product Description</br></br>Commercial grade locksets are engineered to provide years of dependable service in demanding commercial industrial environments. Replaces all brands of commercial door hardware. Deadbolt may be locked and unlocked from both the inside and outside with a key only. Deadbolt latch - 2-3/8-inch to 2-3/4-inch with 1-inch throw and hardened steel roller to resist sawing. Deadbolt features free-spin exterior cover. Fits only 2-3/8-inch openings.</br><br/>http://www.amazon.com/gp/product/B00164L26A