This comprehensive 7-piece door lock router bit set features precision-engineered cutters ranging from 16.5mm to 22mm (approximately 0.65 to 0.87 inches) in diameter. Each bit comes with a 10mm shank for stable operation and is crafted from durable tungsten steel for long-lasting performance. These specialized slotting cutters are specifically designed for creating precise mortises and door lock installations in wooden doors and frames. The stepped design allows for clean, accurate cuts while the threading ensures smooth operation and minimal vibration during use. Perfect for professional woodworkers and craftsmen working on door installation projects, these milling cutters deliver consistent results with clean edges. The set includes seven different sizes to accommodate various lock specifications and door thicknesses, making it a versatile addition to any woodworking tool collection. Each cutter features optimized cutting geometry for efficient material removal and reduced wear.