1. EFFORTLESS INSTALLATION (Before ing, Ensure The Lock Size Fits Your Door!): Easy to install with just a screwdriver. Please make sure it fits your door thickness, hole spacing and bore size. The bottom screw can be adjusted to fit different center-to-center distances, ensuring a perfect fit every time. The screw post center-to-center dimension of the grip is 7-2/3" to 8-6/7" (195mm-225mm, #29 to #35)2. BUILT TO LAST: Made with heavy-duty Zinc Alloy, this door handleset can withstand a vertical pulling force of up to 1000N and has been tested to open doors over 250,000 times. Its advanced electroplating spray paint also provides high-strength anti-corrosion ability, giving it a smooth surface that will last for years to come3. SECURITY, COMPATIBILITY, AND UNIVERSALITY: This front entry handleset is not only secure but also compatible and universal. It can be combined with an electronic deadbolt for a complete front entry set and fits standard doors with 1-3/8' to 1-7/8' (35-45mm) thickness. Its 6-way adjustable latch can also fit any 2-3/8' (60mm) or 2-3/4' backset (70mm)4. ALL-WEATHER PROTECTION: The handleset's ability to withstand all weather conditions means that you don't have to worry about the effects of rain, sun, or snow on your front door