Description：Tubular lockset is an economical and easy to install product, particularly adaptable for residential use. Guaranteed for over 175,000 life cycles. Can be keyed alike with deadbolts to improve security. Solid chassis and latch case, zinc plated for corrosion resistance. 1-piece reinforced knob as standard, esthetic 2-piece knob available upon request. Adjustable backset 60mm or 70mm is available. Fully reversible for left or right handed doors. Door Thickness：30-50mm/35-45mm Backset：60mm/70mm