**Revised Description:** Wooden Door Drilling Kit: Compatible with standard lock sizes for everyday use. Adjustable plastic guide fits doors 1-3/8" to 1-3/4" thick and backsets 2-3/8" to 2-3/4". Durable Construction: Carbon steel hole saw and arbor with reinforced plastic guide for long-lasting performance. Simple Installation: Adjustable template ensures precise drilling. Snap-lock arm adapts to door widths and backsets for easy setup in a few steps. Note: For wooden doors only. Drill halfway from each side��avoid drilling through one side only. Color: Yellow Material: Plastic + Metal Package Includes: 1 x Door Lock Installation Kit (Minor color variations may occur due to lighting or display settings. Slight size tolerance: +/- 1-3cm.) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia