PRODUCT DESCRIPTION Designed for wood or metal screen and storm doors with either 1-1/2, 1-3/4, or 3 inch hole spacing. Fits wood doors from 5/8 to 1-3/8" thick. Mounting screws included to match product finish. Interior locking mechanism provides for enhanced security. Includes spring loaded strike plate. FROM THE MANUFACTURER This knob latch is designed for wood or metal screen and storm doors with either 1-1/2-Inch, 1-3/4-Inch or 3-Inch hole spacing.