General description Reliable Materials: The hole saw and shaft are made of carbon steel, combined with a reinforced plastic guide template, ensuring lasting performance even under frequent use. This makes it a reliable choice for both professionals and DIY enthusiasts. Accurate Drilling: Featuring an adjustable guide template, this set simplifies the drilling process by allowing precise location selection. With its snap lock arm for selecting door width and backset, it enables fast installation with just a few simple steps. Compatibility: This kit is suitable for the most common lock sizes in daily life and is seamlessly compatible with wooden doors. Its versatility ensures compatibility across a wide range of applications, making it a must-have for any toolbox. Technical specifications Material: Carbon Steel and Plastic Applicable Door Thickness: 1-3/8 to 1-3/4 Inch (35mm-43mm) Applicable Backset: 2-3/8 Inch (60mm) or 2-3/4 Inch (70mm) Compatibility and accessories Includes: 1 x