High quality materials: This door lock installation kit uses a carbon steel hole saw and spindle for strength and durability. The parts are wear resistant and eco-friendly, helping ensure long-lasting performance. Wide compatibility: Backsets of 2-3/8 in and 2-3/4 in fit most wooden doors. The included template supports door thicknesses of 1-3/8 in and 1-3/4 in and covers the most common lock sizes, making it suitable for broad use. Easy installation: The template enables fast, accurate drilling and the spring latch arms add stability. You can freely choose the door width and lock edge for a perfect fit. The kit is easy to remove after installation, simplifying the process. Superior craftsmanship: Thoughtful design includes a large chip removal groove for smooth drilling. The erosion-resistant bright finish and rust-proof metal parts increase durability while the smooth appearance provides professional results. Applications and use scenarios: - Install a new standard residential door lock on an interior wooden door. - Replace an old or worn latch on a front or back wooden door. - Use in carpentry projects requiring standard backset and lock sizes. This kit delivers precise, reliable performance with a professional finish, ideal for DIY and professional door hardware work.