1. Practical and complete set: includes 1 Ushaped adjustable rail template, 1 arbor with drill and 2 pieces 1inch and 21/8inch hole saws. The saw cutting depth of 50mm improves work efficiency and gives you more time to improve door security. 2. materials: improve your door security with this door lock installation kit, which features a heavyduty carbon steel hole saw and spindle. With its wearresistant and durable design, the kit is safe to use and environmentally friendly. 3. Widely used: our door lock installation kit is designed for backset measurements of 2 '/8 and 2 '/4 inches and is for wooden doors. This kit includes a template suitable for doors with thicknesses of 1 '/8 and 1 '/4 inches, accommodating the most common lock sizes for versatile applications. 4. Save time and effort: this door lock installation kit comes with a template that helps you drill holes precisely and quickly, saving you time and effort. You can also adjust the template to fit different door widths and lock positions, then easily remove it after use.