Door Hole Drilling Kit for Wooden Doors: designed to work well with wood doors in the most common lock sizes for everyday use; Adjustable plastic guide template fits 1-3/8-inch and 1-3/4-inch thick doors and accommodates 2-3/8-inch and 2-3/4-inch backsets Professional Quality: the hole saw and arbor are made of carbon steel, combined with a reinforced plastic guide template, providing durable performance even with frequent use Easy Lockset Installation: the adjustable guide template allows for precise and simple drilling; the snap-lock arm adjusts to fit various door widths and backsets; installation can be completed in a few straightforward steps Notice: this door lock installation kit is intended for use with wooden doors only; do not drill completely through the door from one sidebore halfway through from each side of the door Material: plastic Color: red Package Contents: 1 x Door Lock Installation Kit Note: the package includes only the items listed above; other items are not included Note: lighting and display differences may cause slight variations in color as seen on screen compared to the actual product; measurement may vary by +/- 1-3 cm