1. High-quality materials: These drill bits are made of high-speed steel, which is durable and suitable for a variety of woodworking tasks. The steel trim and hexagonal shank increase their functionality and sturdiness. 2. Precise positioning: Our hinge drill bits ensure precise positioning. The drill bit remains precisely in the center of the hole position without any movement, ensuring a perfect fit with your door and window hinges. 3. Efficient chip removal: With a double-sided chip removal design, wood chips are automatically discharged through the holes on both sides of the drill bit. This fast chip removal function prevents the drill bit from getting stuck, allowing for smooth operation. 4. Easy drill bit replacement: Changing drill bits is a breeze. Simply use the included small hex wrench to loosen the screws on the drill sleeve to quickly change the drill bit, which is convenient for different projects.