【Keyed Different】When you buy more than 11 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 54mm). 【Material】Zinc Alloy,Matte Black Finish. 【Easy Installation】Contains all accessories and installation instructions,Only need a screwdriver to install.