Concealed Hinge Jig: The Drill Bit Is Made Of Cemented Carbide, Hole Punch Locator Is Made Of Abs Plastic, Which Makes Cutting More Clean And Unhindered. Fixed Drill Jig: The Drill Bit Set Can Be Adjusted To Suit Of Door Edge Change, Which Is Suitable For Drilling Hidden Hinges And Door Locks. Widely Application: Forstner Bit 35Mm Suitable For Drill Press, Gun Drill, Bench Drill , Moving Tape Type Magnetism Drill, Etc. Easy To Use: The Concealed Guide Of The Hinge Jig Drill Guide Sets Can Quickly Locate The Center Point Of The Hinge Even If You Are Not Professionals, You Can Quickly Locate Center Drill Points For Hinges And Mounting Plates. Specifications: 35Mm Diameter, Suitable For 35Mm Concealed Hinges. The Package Contains 1 * Positioning Device And 1 * Cutter Head (Please Note: Concealed Hinges Are Not Included).