For wood or metal screen & storm doors with either 1-1/2", 1-3/4", or 3" hole spacing. For doors from 1-3/8" to 2" thick. Use pan mach screws 6-32 x 2-1/4". Not provided, design is patented.Textured Black finish on the knob inset. Interior locking mechanism provides for enhanced security. Satin black Knob latch For