Passage Function: * Glass Crystal Door Knobs & Contemporary Design * Both sides of this beautiful lock head are always free and there is no locking function making it perfect for hallways, closet doors, pantry and anywhere else a lock isn't needed.Specification:--Type: Privacy function for bed/bath --Backset: Adjustable to 2-3/8" or 2-3/4" --Door Thickness: 1-3/8" or 1-3/4" --Hardware Finish:zinc alloy base with crystal glass door knobs --Note:They are much bigger than traditional doorknobs.Please pay attention to the distance between door and wall,it may related to doorstops issue you might have installed.Features: √The plate on the Latch is square shape and can not removable √Gorgeous Visual Effect under light & Modern Design will upgrade your home decor √Fit comfortable in Hand & Top-notch Craftsmanship will earn you much compliment √Designs and finishes can match most home's architectural style,perfect choice for renovation of old house √Easy Installation:Tools for replacement installation, philips screwdriver.One-person project; no extra hands needed Tools required for new installation:hammer,chisel,measuring tape,power drill,removable tape,pencil.2-1/8〞hole boring saw,1〞 hole boring bit ,1/8〞 drill bit,Safety Googles.