National Hardware N178-806 V1308 Universal Knob Latch in Black Product Description This knob latch is designed for wood or metal screen and storm doors from 5/8? ? 1-3/8? thick, with either 1-1/2-Inch, 1-3/4-Inch or 3-Inch hole spacing. The dual locking design with exterior key lock and separate interior locking mechanism provides enhanced security. Includes a spring loaded strike plate and mounting screws designed to match the product finish. 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. Features Fits wood doors from 5/8" to 1-3/8? thick Dual locking design - exterior key lock-separate interior locking mechanism Interior locking mechanism provides for enhanced security Mounting screws included to match product finish USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.