1. SAFE SECURE FOR ADDED SECURITYThe Entrance door handle is for office or front door. It can be locked and unlocked from both sides by an outside key or an inside turn button. One key can open the same lock with the same key blank and keyway. 2. Adjustable LatchAdjustable Latch with Backset 60mm(2 3/8') or 70mm (2 3/4''); Fits all doors 35 to 45 mm (1 3/8 '' to 1 3/4 '') thick. Notice: The latch plate is square and non removable. 3. MATERIAL:Stainless Steel; Color: Black; Stainless Steel Plated Lock set with Black finish that won't rust, durable for long lasting use. Great Quality and High Security:Conformed with ANSI Grade 3, Exceeds 200,000 cycles and has a 5 pins brass tumbler cylinder; Solid Column security bolt for anti sawing protection. 4. SIMPLE EASY INSTALLATIONEasy and simple fitting helps to save you time and provides a r and more secure installation. No small and fiddly parts, just reliable solid hardware that will pass the test of time. Packaged individually to ensure perfect condition upon arrival.