Baldwin, 8031, Keyed Entry, Traditional, Deadbolt, Single Cylinder, Traditional Style Single Cylinder Deadbolt for a 1-5/8 Bore Hole Keep your home safe with this stylish single cylinder deadbolt. Its unique design is the perfect finishing touch to any door. The single cylinder design is locked and unlocked by key on the outside and push turn on the inside. Deadbolt case i8s formed with heavy gauge steel Grade 1 ANSI Rating Specially-designed reinforcing strike constructed of high grade steel for ultimate strength and durability The cylinder housing is protected with a free-turning exterior cylinder guard fabricated from solid brass to resist gripping or twisting.