Lock System: Single cylinder deadbolt and door knob combination set with keyed alike feature for convenient access；Each set with 4 same keys. Construction: Made of stainless steel material with Premium matte black coating ensures long-lasting performance and enhanced security Outside Access: Keyed entry on both the deadbolt and door knob Inside Operation: Thumb turn buttons for easy, keyless locking/unlocking from inside Compatibility: Universal design suitable for both right-handed and left-handed door;Fit all doors 1-3/8\" to 1-3/4\"thickness;Adjustable latch from 2-3/8 - 2-3/4 inches (60-70mm). Installation: Includes easy-to-follow instructions and all necessary mounting hardware for quick setup; also includes a template for hole 2-18”(54mm) dia. Backed by an Cielsa Dawn 1-year limited warranty › See more product details