Simplex Auxiliary Pushbutton Deadbolt
Product Description 1 (25mm) Tubular deadbolt pushbutton lock
Fits doors 1-2/8to 2-1/4 (35mm to 57mm) thick
Covers existing holes up to 2-1/8 (54mm) in diameter
For interior or exterior use.
Mounts above existing primary lockset
All mechanical no batteries or wiring
Thousands of possible combinations
Locks by rotating turn knob (inside and outside)
Unlocks outside by depressing combinations & Rotating turn knob,
Unlocks inside by rotating turn knob.