Easy installation: includes all screws and accessories; upper and lower screw holes ready for a one-person installation. Reversible door handles suitable for left- or right-handed doors. Safe and secure keyed entrance: designed for exterior doors (knobs or handle sets). Lock outside with keys and operate inside with a turn button. Each lock uses a unique key. Specifications: fits door thickness 35 mm to 45 mm (1.38 in to 1.78 in). Adjustable latch from 60 mm to 70 mm (2.4 in to 2.8 in). Material and finish: stainless steel and zinc alloy construction with a black finish and modern wave style levers. Package includes: selected knobs, mounting screws, installation instructions. Use scenarios: - Exterior entry for homes, offices, or rental properties that require keyed security. - Suitable for left- or right-handed doors due to reversible handles. - DIY installation suitable for a single installer.