Material: PP Size: 16*18*7CM Color: As shown 1. High-precision ball lock hole opener, specially designed for wooden door lock installation, ensures smooth drilling without burrs, and improves installation efficiency. 2. Made of high-quality alloy steel, it is one lasting and suitable for a variety of door lock types to meet professional and home use needs. 3. Humanized handle design, comfortable grip, effectively reduces hand fatigue, and makes door lock installation easier and more convenient. 4. Strong compatibility, can be used with various power tools, suitable for DIY enthusiasts and professional craftsmen, significantly improving work efficiency. 5. Precise positioning system, reduce errors, one-time molding, save time and materials, and is an ideal choice for door lock installation. Package includes:1 PC U-shaped adjustable plastic guide template, 2 1" (25mm) and 2-1/8" (54mm) hole saws, 1 PC mandrel with drill bit. Saw depth 50mm