Probrico home building mainly deals in door locks, handles, hinges and other products, and has rich experience in lock hardware, design, production and sales. Probrico products are exported to Europe and the United States. Customers are very satisfied with our products and services. We believe that we can provide you with high-quality products and services.All Probrico door locks have the following features:All handles are made of No. 3 zinc alloy, which has high density and high strength;Confirm with ANSI Grade 3, Exceeds 200,000 cycles;Universal handing; fits both right handed and left handed doors；Latch has adjustable backset 2-3/8" to 2-3/4" to fit all standard door preparations；Function Available:Privacy: with lock function but keyless, you could locked inside, but can't open outside as there is no key. Usually for Bedroom/Bathroom door. (could open with coin in emergency)Passage : no key, can't be locked, but has the latch,so just turn to open. Usually for Hall or Closet door.Entry-Keyed Alike: 1 key could open all locks, very convenient.(3 keys included for each lock)Entry-individual key: Different key to open each lock.(3 keys included for each lock) Dummy: only single knob(no latch).