Amazon.com.au:Customer reviews: Home Security Door Lock, Childproof Door Reinforcement Lock with 3" Stop 4 Screws Withstand 800 lbs for Inward Swinging Door, Upgrade Night Lock to Defend Your Home (Black-2 Pack)
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
This product was described as easy to install and it is except the part they don't tell you until you buy and get the product and read the instructions is that you have to use a chisle and a hammer to notch out a section of your door frame for the lock mounting surface to fit in between your door and the door frame.