Makes cabinet door installation easy. The concealed hinge jig allows for drilling cup holes for concealed cabinet door hinges. Accurate hinge positioning with built-in indexing tabs. Repeatable results with built-in measuring scales. Reliable drilling with bit guide and stop collar. Simple to use with any drill - no special tools needed. Adjustable cams ensure proper hinge offset. Strong, lightweight materials for easy handling. 3 mm, 4 mm, 5 mm, 6 mm hinge offset. 2 In. to unlimited hinge offset from door end. Includes jig base with index cams, drill guide, durable four-cutter carbide-tipped drill bit, stop collar with hex wrench, owner's manual.