Easy to use: With the locking arm and options for door width and door frame distance, you can complete the installation in four simple steps. How to use: The adjustable guide template facilitates precise drilling and is equipped with a spring-loaded locking arm to select the door width and door frame height. Drill vertically through one side of the door panel until halfway through, then drill through the other side of the door panel until fully penetrated. Applicable scenario: This door lock pick kit is suitable for the most common wooden door lock sizes used daily. The adjustable plastic guide plates are suitable for doors with thicknesses from 1-3/8in to 1-3/4in, as well as door frames 2-3/8in and 2-3/4in thick. Precise and adjustable: The door lock installation kit with a guide template is equipped with an adjustable guide template, allowing for precise drilling. Strong material: This door lock opener is made of strong carbon steel to ensure long-lasting durability. The hole opener, shaft, and reinforced plastic guide shape are carefully designed to withstand heavy use.