This is a 35mm Hinge Boring Jig, a precision woodworking tool designed to help DIYers and professionals accurately install concealed cabinet hinges [4, 9]. Made from durable aluminum alloy, the jig serves as a template to locate and drill the 35mm "cup" hole and surrounding screw holes with perfect alignment [1, 10]. It features adjustable edge margins (typically 3mm to 6mm) to accommodate different hinge offsets, ensuring that cabinet doors hang straight and function smoothly without the need for manual measuring or guesswork