Accurate positioning: Easy to measure with a matching opening position locator ruler that is removable for more precise hole placement. Clear scale: Allows easy measurement of the distance from the edge of the door to the center of the required opening, with a measurable range of 30100 mm for increased accuracy. Hole cutter not limited by fixed position: Enables convenient operation and can be moved freely with an electric drill; features a separate design for the hole cutter and hole opener. Accurate depth limit: Designed for 12 mm depth and 35 mm diameter holes; hexagonal shank prevents slipping for efficient drilling. Color: Red Material: Aluminum Alloy Package Contents: 1 x Woodworking Hole Opener Locator Puncher Aid Note: The package includes only the items listed above; other products are not included. Note: Due to light reflection and differences in display screens, the color of the item in the image may vary slightly from the actual product. Measurement may have an error margin of 13 cm.