Efficient door lock installation kit with a set of essential tools to cover different needs. Includes 1 U-shaped adjustable guide template, 1 spindle with drill, and 2 hole saws (1 inch and 2-1/8 inch) with a 50 mm drilling depth for precise, clean cuts. Reliable materials for lasting use. Made from high-quality carbon steel for the hole saw and spindle, this set resists deformation and wear. The durable construction supports long-term performance while remaining safe and environmentally friendly for everyday door security work. Widely compatible for common backsets and door sizes. Works with 2-3/8 inch and 2-3/4 inch backsets on wooden doors. The template accommodates doors 3.5 cm and 4.5 cm thick and fits most standard lock sizes, making it a versatile choice for frequent installations. Simplified installation for accuracy and speed. The template provides easy, precise drilling with spring-loaded latch arms. It adjusts for different door widths and lock edges, and can be removed quickly after drilling for a smooth, efficient workflow. Use scenarios: - Replacing a door lock on a wooden interior door with standard backset (2-3/8" or 2-3/4"), using the included 1" and 2-1/8" hole saws for bore holes. - Installing a new lock on new wooden doors during renovation, benefiting from the adjustable template and clear depth guidance. - Servicing multiple doors in a workshop or construction site, where the template and compatible sizes streamline repeated lock installations.