【Keyed Different】When you buy more than 8 sets, please note that the keys in each package are different. They cannot be unlocked from each other. 【Universal】This lever is reversible. Fits left and right hand doors. 【Adjustable Backset】2-3/8 inch or 2-3/4 inch (60mm or 70mm); Fits doors thickness:1-3/8 inch to 1-3/4 inch (35mm to 51mm). 【Material】Zinc Alloy,Matte Black Finish. 【Easy Installation】Contains all accessories and installation instructions,Only need a screwdriver to install.