National Hardware® N178-822 Universal Knob Latch w/ Strike Plate & Key, SilverNational Hardware V1308 Universal Knob Latch is designed for wood or metal screen and storm doors with either 1 1 2", 1 3 4", or 3" hole spacing. 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. Manufactured from zinc die cast. Finish: Silver Material: Die Cast Designed for wood or metal screen and storm doors with either 1 1