Versatile Compatibility: Designed to accommodate both round (1/4-inch and 5/8-inch radius) and square corner hinges. This jig is perfect for hinges ranging from 2.5 inches to 5 inches, fitting most interior and exterior doors (Note: not for door frames). Premium Construction: Crafted from aluminum alloy, this door hinge jig features an anodized treatment, enhancing its resistance to deformation by 300% compared to standard materials. Ideal for precise hinge installations. Ease of Use: Equipped with multi-stage depth adjustment, self-centring drill bits, and double-ended screwdriver bits, this jig simplifies operations and boosts efficiency. Rubber anti-slip pads stability and protect door surfaces. User-Friendly Design: The clear structure and straightforward functionality make this hinge jig accessible to beginners and professionals alike. It's an essential tool for efficient door installations, requiring no skills., Manufacturer: Aundhegrtt