National Hardware® N212-993 Universal Knob Latch, WhiteDesigned for wood or metal screen & storm doors with either 1 1 2". 1 3 4" or 3" hole spacing, will fit doors up to 2" thick. For doan mach screws 6 32 x 2 1 4" not provided. Designed is patented. Mounting screws included to match product finish. Interior locking mechanism provides for enhanced security. White knob latch 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