Confirm with ANSI Grade 3, Exceeds 200,000 cycles; 5 pins pick resistant brass cylinder, brass key nickel plated.Wear-resistant and corrosion-resistant Black Finish: anti-fingerprint, more attractive, durable; Modern ball handle, no compatible with sharp edges, rounded without hurting hands Privacy knobs without keys, designed for a private space, such as for bedrooms and bathrooms, be locked with turn buttons without a key. Use for bathroom or bedroom door. Reinforced lock latch, resistant to impact, not afraid of slamming the door Latch has adjustable backset 2-3/8" to 2-3/4" to fit all standard door preparations:fits doors thicknes:1-3/8 inch to 1-3/4 inch (35mm to 45mm) Universal handing: fits both right handed and left handed doors；Package Includes: Selected Door Knobs, Keys, Solid Latch, Screws, Installation Instructions and all the mounting hardware needed. Easy to Install Confirm with ANSI Grade 3, Exceeds 200,000 cycles; 5 pins pick resistant brass cylinder, brass key nickel plated.Wear-resistant and corrosion-resistant Black Finish: anti-fingerprint, more attractive, durable; Modern ball handle, no compatible with sharp edges, rounded without hurting hands Privacy knobs without keys, designed for a private space, such as for bedrooms and bathrooms, be locked with turn buttons without a key. Use for bathroom or bedroom door. Reinforced lock latch, resistant to impact, not afraid of slamming the door Latch has adjustable backset 2-3/8" to 2-3/4" to fit all standard door preparations:fits doors thicknes:1-3/8 inch to 1-3/4 inch (35mm to 45mm) Universal handing: fits both right handed and left handed doors；Package Includes: Selected Door Knobs, Keys, Solid Latch, Screws, Installation Instructions and all the mounting hardware needed. Easy to Install