Universal knob latch is designed for wood or metal storm doors with 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 and separate interior locking mechanism. Interior locking mechanism provides for enhanced security. Includes spring loaded strike plate. Made of zinc die cast. Use Y11 (SKU 202435) key blank.