This door latch lock will provide a reliable barrier to against unauthorized entries. Heavy duty metal barrel bolt. Great quality and does the trick. Install in just minutes using hardened screws. Need a flat/level surface. Requires Drill, drill bit and screwdriver. Small latch lock but will hold your door shut firmly. Stronger than a common door bolt. Extra support on the door .Used in both a horizontal and vertical position, great for right or left side installation.