Durable construction and long life - Made with carbon steel blades and shaft and a wear resistant reinforced plastic template. The solid build provides durability and a long service life for everyday use. What is included - One U shaped adjustable plastic template - Two hole saws sized 1 inch and 2-1/8 inch - A shaft with a drill bit - Hole saw blade depth is 50 mm Compatibility and fit - Suitable for common lock sizes on wooden doors - Adjustable template fits door thicknesses of 1-3/8 inch and 1-3/4 inch - Backset options compatible with 2-3/8 inch and 2-3/4 inch Easy setup and accurate installation - Adjustable template allows quick selection of door width and backset using lock knobs - Can be completed in four simple steps Practical features - Special design with enhanced chip removal helps with easy plug extraction - User friendly kit that is suitable for home use and DIY projects 2-3 practical use scenarios - Install a new lock on a standard wooden interior door in a home or apartment - Replace a worn or damaged lock hole on a bedroom or office door - Upgrade door hardware on a wood exterior or interior door as part of a DIY renovation Notes - All components are designed to work together and maintain alignment for accurate mortising and hole cutting on wooden doors.