Practical and complete set Includes 1 x U-shaped adjustable rail template, 1 x drill chuck with drill bit, and 2 x hole saws in 1 inch and 2-1/8 inch sizes. The 50 mm cutting depth increases work efficiency and provides more time to improve door security. Durable materials you can trust The door lock installation kit features a robust hole saw and a spindle made from carbon steel. The wear-resistant construction delivers safe, reliable performance and is environmentally friendly. Versatile compatibility for standard doors Designed for 2-3/8 and 2-3/4 inch backsets, this kit is well suited for wooden doors. It includes a model that works on door thicknesses of 1-3/8 and 1-3/4 inch and adapts to the most common lock sizes, making it suitable for general use. Time-saving and easy to use A guided model helps you drill holes precisely and quickly, saving time and effort. The setup can be adjusted to fit different door widths and latch edges, and it is easy to remove after installation. Use scenarios - Replacing a worn or mismatched lock on a wooden interior door, ensuring bore holes align with the new hardware. - Installing a new lockset on a front or exterior wooden door that requires a 2-3/8" or 2-3/4" backset and standard bore sizes. - Upgrading door security in a DIY project, with adjustable door thickness and backset to accommodate common lock configurations.